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Candle Holder — $4.00
The unique triangular construction of this four-pronged, all-metal holder keeps candles up to 1.5cm diameter secure on your meter stick so you can obtain accurate readings.

Cotton Balls — $4.98

Straws — $8.75
Individually wrapped. Plastic. Length: 7-3.4". Package of 500.

Geranium — $8.39
Special promotions and discounts do not apply to this item.

Hand Air Pump — $38.75
Sturdy Hand Pump Features Hose Connectors For Vacuum And PressureThis solidly constructed air pump has an enameled steel barrel, plated steel valve hardware, and a wooden handle. The molded rubber piston has a triple O-ring seal, and both the inlet and exhaust ports are equipped with 9mm plain hose connectors. This allows the pump to be used with standard thick-wall tubing for vacuum experiments and also to generate overpressure. Dimensions: Length is 35cm, barrel diameter is 2.5cm, length of stroke...

DESKTOP WEATHER STATION — $105.00
A virtual meteorologist, this digital desktop weather station records barometric pressure, relative humidity, indoor and outdoor temperature, and min/max tempurature at all times. The barometric pressure for the past 24 hours also appears in a history graph in Hg or hPa. A forecast icon appears in the center of the LCD display based upon barometric pressure. Additional icons indicate an indoor comfort level, current moon phase, and time zone. The weather station can be mounted or free standing, and...

BUSHNELL BINOCULARS, 10 X 50 — $83.50
With light-grabbing 50 mm (2") lenses and powerful 10X magnification, these binoculars offer a good balance of image resolution and field of view, 341' at 1,000 yards. A case and 32 3.4" neckstrap are included. Exit pupil 5 mm (3.16"). Size: 6"L x 7"W x 2"H; weight: 25 oz.

RS232 Interface Cable for Ohaus Balances — $99.09
Nine pre-programmed laboratory applications including animal weighing, parts counting, percent weighing, and check weighing. Programmable filtering to compensate for vibrationsand other disturbances. Weigh-below hook for density/specific gravity determination. Brilliant backlit display with two lines of data. Battery or AC operation (AC adapter included).

TI-30X IIS Scientific Calculators — $22.00
The slide rule calculator runs on solar power, both indoors and out. It performs 63 functions such as common and natural logs, trigonometric functions, and coordinate conversions used for scientific graphing.

The Pendulum Wave — $85.00
Nine pendulums arranged on a frame are adjusted to have successively increasing periods. When released simultaneously, the different periods cause the pendulums to cycle through all possible relative phase relationships, periodically returning to the starting arrangement. At intermediate times, the phase relationships of the pendulums display a moving transverse wave pattern. The apparatus is supplied disassembled, as the assembly and adjustment processes are part of the learning experience, giving...

Rayovac® Battery Charger and Ni-MH Batteries, AAA Ni-MH Battery, Pkg. of 4 — $16.95
Be kind to the environment and save money using a rechargeable battery system. This system accepts Rayovac® rechargeable alkaline, Ni-MH, and Ni-Cd batteries. Charger incorporates computer microchip technology for faster, easier use. Monitors and charges each battery individually to maximize use on every charge. Charge up to eight AAA or AA batteries, four C or D batteries, and one 9V in combination or alone. 120VAC. UL listed. Ni-MH rechargeable batteries listed below can be charged up to 1000 times...

Garden Spider — $8.66
This Item is currently on backorder and will ship when it becomes available

Compact Wireless Weather Station — $59.95
Track the trends of both indoor and outdoor temperature with this conveniently sized weather station. The device also measures humidity, provides comfort index icons, and offers the moon phase. A calendar with day of the week is included along with a clock featuring snooze alarm. The remote sensor can link to up to three units. CE and RoHS compliant.

Cheesecloth — $5.95
Soft and absorbent. Recommended for all laboratory cleaning. Can also be used for filtering. Made without starch. Width: 91 cm; length: 4.6 m. Quantity: 5 sq. yd.

Wood Block — $5.00

Plastic Utility Cart — $299.00
Shelf clearance: 11". Capacity: 300 lbs. Size: 34 7/8" x 32 1/2" x 17 1/8". Shipping weight: 31 lbs. Beige cart is shipped unassembled.

Celestron SkyScout Personal Planetarium — $259.99
An innovative way to explore the universe, this personal planetarium locates over6,000 stars, planets, and constellations from the included databases and provides scientific background information for each object. Comprehensive text and audio descriptions detail the history, mythology, and fun facts for the most popular stars and constellations. You can also find a customized list of the 20 best objects to view on a date and time of your choosing anywhere in the world. For further exploration, a...

Vinegar, White — $4.55
Vinegar, White, Grade: Household, Distilled White Vinegar, 472mL Bottle

Fern Set — $18.99
Three different species of ferns for comparison study or terrarium.

Light Source — $31.00
A handy addition to your optical bench, this light source features a 7.5-watt incandescent lamp plus a cord and plug for connection to 110VAC power source.

Roots — $6.49
Corresponding monocot and dicot structures on the same slide (CS).

TI-34 Multiview Calculator — $29.00
Ideal for algebra and trigonometry, this scientific calculator converts fractions to decimals and vice versa. The integer division key also expresses results as quotient and remainders.

Rand-McNally World Wall Map — $23.95
Keep your classroom up-to-date with our wall map that accurately reflects the changes in the geo-political boundries of the former USSR. Vibrant colors vividly chart the world on this plastic- coated, durable wall-size map. You’ll find thousands of cities, islands and rivers easily on this detailed map. Hangs flat with rigid steel top and bottom edges. Size: 52" x 35".

AC/DC 12 V Power Supply — $289.95
Use the two independent outputs on this power supply simultaneously. Both 12 VAC and 0–12 VDC regulated outputs are continuously variable via the control knob on the right side of the front panel. Includes overload protection indicator, glass fuses at the input level, and one spare fuse at the mains input socket. CSA approved.AC/DC Ranges/Current: 0–12 VDC/ 5A12 VAC/ 5A. Load: 0–100% at 100mV variations; Line regulation 105–130 VAC at 200mV variations. Protection: Unit is properly earthed and tested...

Test Lead Wire Set — $29.45
Set contains one red and one black 48″ test lead with right angle banana plugs, two test lead insulators — one red, one black, two plunger-type clips — one red, one black and one red spade lug, two clip insulators — one red, one black, and alligator clips.

Mercury — $52.45
Mercury, Reagent ACS, Triple Distilled, 100 g Bottle

Camphor — $12.49
Camphor, Laboratory, Synthetic Crystal, 100 g Bottle

Magellan Triton 400 GPS — $259.99
Instant access buttons, uncomplicated menus, an intuitive keypad, and crystal clear graphics are just a few of the amazing new features in this easy to use GPS. A brilliant, 2.2″ color display reveals maps, menus, and navigation screens in large identifiable type and icons. Use the compass screen to view the direction of travel, distance and position of destination, bearing, speed, and more. This waterproof model’s SD-card compatibility also equips it for unlimited map data — add more tracks, waypoints...

Celestron Accessory Kit — $205.00
Kit contains: 5 Plössl Eyepieces (4mm, 6mm, 9mm, 15mm, 32mm) 1-2X Barlow, 6 Filters, 1 Moon Filter, Aluminum Case.

Antacid Tablets — $8.50
For laboratory use only; not for human consumption.

Digital Pocket TDS Meter with Case — $59.00
This lightweight, pocket-sized meter features a digital display and automatic temperature compensation. The electrode extends to 3.15" for use in a variety of field and lab applications. Included with the meter is calibration solution, a calibration screwdriver, 9V battery, and hard carrying case. Range: 10-9990 ppm.

Galileo Thermometers — $35.00
This elegant and timeless instrument is based on Galileo’s theory that a fixed mass’s buoyancy is inversely related to the liquid temperature of which it is suspended in. Watch the liquid filled spheres rise and fall in the column based on the ambient temperature. Each sphere is fixed with a Fahrenheit metal tag. The lowest sphere in the top of the column indicates the ambient temperature. Available in various sizes.

Contact Goniometer — $11.29
Use our unbreakable plastic instrument for quick, accurate measurements of angles between crystal faces. Instructions are included.

PLASTIC VERNIER CALIPER — $8.55
Perfect for student use. Full-Size Vernier Caliper, durable plastic with metal parts. English and metric scales read to 5 inches in 1/16 " increments or 12cm in 1mm increments. Vernier permits measurements to 1/10 of a division.

Digital Stopwatches, With Split Time Function — $30.65
Count up to 9:59:59 with 1/100 sec. precision and accuracy of .0004% second. This rugged, water-resistant watch features a single line display and black plastic case.

Acrylic Bifocal Lens Magnifiers — $6.20
High quality acrylic lens has a bifocal segment for additional power. Plastic frame and handle.

Cellulose Sponges — $4.40
Cellulose Sponges, Dimensions, L x W x D, in.: 6 x 3.5 x 1.5, Each

Indoor / Outdoor Thermometer — $11.95
Display Indoor and Outdoor Temperatures SimultaneouslyOne compact black housing contains two dual-scale Permacolor liquid thermometers. A five-foot lead and an outdoor sensing bulb is also included.Temperature range: -60¿‹F to +120¿‹F (- 50¿‹C to +50¿‹C). Size: 9 3.4"L x 2 1.4"W x 3.4"H.

Hook & Squidy Cartesian Diver, Squidy Cartesian Diver — $5.35
Use these two kits to teach the transmission of pressure in all directions and the compressibility of gases. Squidy™ is a classic cartesian diver. Hook™ is a cartesian diver game – use the diver to hook a sinker at the bottom of a soda bottle. You supply a 1 liter soda bottle.

Earthworms, pkg/12, Live — $9.89
Special promotions and discounts do not apply to this item.

Darning Needles — $6.30
Use these heavy 6.5cm long steel needles for magnetizing with our Steel Bar Magnet. Package of 25.

Yardstick, Hardwood — $3.80
Measures up to: 36 in., Graduations: 1/8-yd., inch, 1/8 in.

Magnetic Levitation Set — $29.79
Guided by the included project book, students investigate the properties of magnets and their interactions. The book features projects of increasing difficulty, finally building their own “levitating train!” Kit also includes ten disk magnets, ten latch magnets, two 24″ magnetic strips, two high force magnetic strips, one neodymium magnet, one small compass, five wood blocks, six plastic angles, one 4″ dowel, and iron filings.

AP Physics Lab 3: Gravity (CENCO) KODAK Zi8 Pocket Video Camera — $179.99
The use of a video camera offers students a new way to investigate the motion of an object due to gravity. An included launcher has two setting for varying the launch speed and the removable washers allow you to change the mass of the projectile. As a comparison of motion of acceleration due to gravity, students first investigate the motion of a constant velocity car. When the graphs of the motion of the car and projectile are analyzed, students will develop a better understanding of acceleration...

Alnico I Horseshoe Magnets — $19.32
Alnico I Horseshoe Magnets, L x W x D, mm: 38 x 46 x 14

Automatic Digital Wrist Blood Pressure Monitor — $182.00
Quickly and easily measure blood pressure and pulse rate automatically from your wrist. Eliminate placement errors with the specially designed cuff which fits around the wrist. Easy to read, oversized LCD indicates blood pressure, pulse rate, graphic symbols, time and date. Also features two-person memory recall system. Auto shut-off saves battery life. Comes in a portable, self contained carry case. Includes: four “AA” batteries, blood pressure log and instructions.

Heavy Duty Shears — $10.00
These shears will cut almost anything in the lab from heavy tubing, to wire, to 24-gauge stainless steel. Made from fine surgical stainless steel, specially hardened. Shears have one serrated blade with comfortable plastic handles. They never need sharpening and are fully autoclavable. Total length: 7".

Soil Thermometers — $14.50
This durable, easy-to-read, 1″ dial thermometer features a stainless steel stem, polycarbonate lens, external calibration feature, and a plastic pocket case with clips. Range: -10–110°C in 1°C divisions.

Kinetic and Potential Energy Track, Track — $82.00
Present a clear, concise hands-on demonstration of the conservation of energy. Mechanical energy, friction, and inertia concepts are introduced with quantifiable determinations. A marble starts on one hill and gains speed on the way down, then slows down while going up the other hill. Challenge students to find the spot where the marble can roll to the top of the other hill and then stop. Students can investigate potential energy changing to kinetic energy using the increments on the side of the...

Latex Medical Gloves, Powder-Free Latex, Size: X-Large — $16.95
Durable wrist-length gloves are ambidextrous; non-sterile. Supplied in a convenient dispenser box of 100 gloves.

Forensics for Dummies — $24.00
With Forensics for Dummies , everyone can get the lowdown on the science behind crime scene investigations. Using fascinating case studies, forensics expert Dr. D. P. Lyle clues people in on everything from determining cause and time of death to fingerprints, fibers, blood, ballistics, forensic computing, and forensic psychology. With its clear, entertaining explanations of forensic procedures and techniques, this book will be an indispensable reference for students everywhere. It even includes advice...

KODAK Zi8 Pocket Video Camera — $179.99
The camera features a 4X digital zoom, a large 2.5" display screen and an internal memory capable of storing 128 MB. Includes the Pocket Video Camera,a Kodak Li-Ion Rechargeable Digital Camera Battery, an adapter and cable for battery charging, HDMI and AV cables, wrist strap, user guide and Arcsoft Media Impression software for Kodak (compatible with PC only).

Skull Models Velociraptor — $67.50
Scale: 1:1; size: 7 7.8"L x 6 7.8"H; weight: 1 lb., 11 oz.

Blotting Papers — $93.00
Heavy-weight blotting paper dryers for our plant presses. Sheet Size: 12" x 18". Package of 100.

Rayovac® Battery Charger and Ni-MH Batteries, Charger — $58.95
Be kind to the environment and save money using a rechargeable battery system. This system accepts Rayovac® rechargeable alkaline, Ni-MH, and Ni-Cd batteries. Charger incorporates computer microchip technology for faster, easier use. Monitors and charges each battery individually to maximize use on every charge. Charge up to eight AAA or AA batteries, four C or D batteries, and one 9V in combination or alone. 120VAC. UL listed. Ni-MH rechargeable batteries listed below can be charged up to 1000 times...

20:1 Attenuator — $80.85
Measure the fuel injector and primary ignition waveforms of Pico oscilloscope products with this attenuator. It has a 20V signal at its input which appears as a 1V signal on the output. When the signal is attenuated, voltages which are higher than the ±20 V input range of the Pico oscilloscope can be measured. This unit, when used with the Pico PC oscilloscope, also provides increased input protection against overloads when working with inductive signals such as primary ignition and injectors.

Mercury Light Source — $115.00
Versatile and inexpensive, this low-intensity light source can be used to observe the mercury emission spectrum or for interferometry (with filters). You can isolate the principal mercury wavelengths with the filters provided. You get four color filters (red, blue, green and yellow) and a diffuser. Operates on 115V, 50/60 Hz. Includes instructions. Size: 8 x 13.5 x 8cm high.

Sea Anemone — $31.85
Metridium. We offer two sizes of well extended specimens. In WelchSafe. Diameter measured at base. Packages of 10.

BOWLES STETHOSCOPE — $10.95
Economical, good quality stethoscope can be used for many basic diagnostic procedures. Has adjustable, chrome plated biaurals and durable Y-tubing for years of use.

Digital Talking Timer — $15.36
Count down from 23:59:59 and count up to 23:59:59 with this single line, 12 or 24 hour clock display watch. An automated voice announces the time remaining and you can choose from eight different alarm sounds. Includes auto memory, stand clip, and batteries.

Yankee — $11.49
Needs Painting: Yes, Fins: Die-cut Balsa, Weight w/o Engine: 0.71 oz., Engine Options: A8-3, B4-4, B6-4, B6-6, C6-5, C6-7, Likely Altitude: 600' - 1000', Min. Dia. Launch Site: 150' - 275'

Ohaus Rotary Spring Scales, 500 x 5 g/18 x 0.25 oz — $20.00
With effective scale lengths of nearly 9", Rotary Scales offer greater accuracy thanlinear scales. All are graduated in either g/oz or g/newtons. The smooth action rack,four pinion movement and rugged case ensure years of hard use. Dial: 3" dia; metalsuspension ring at top and hook at bottom.

4 Scalpel Handle — $5.40
For use with larger surgical blades. Use with the #4 series of blades. Recommended for heavier dissections. Stainless steel.

Retractable Blade Knife — $8.25
A plastic handled knife with retractable razor-sharp blade. Three blades included.

Basic Student Calculator — $9.95
Solar-powered calculator features four basic functions, three key memory, percent, square root, floating decimal, and constant function. An easy to read eight digit LCD screen can be clearly read. Includes a plastic case. Size of each: 3-1/4” x 4-5/8”.

Activated Charcoal — $6.50
Quality activated carbon for aquarium filters. 8 oz.

TI-108 Calculator — $8.50
This sturdy calculator features an ANYLITE solar panel, enabling the calculator to operate in low light conditions with no batteries required. The large plastic keys are tamper proof for maximum durability.

Acrylic Prism Set — $18.35
Set of three crystal-clear acrylic, equilateral prisms: 25mm faces, 25mm, 50mm, and 100mm long.

Salinity Refractometer — $115.00
Test kits run out; hydrometers shatter and only read accurately at 20°C. A better alternative is this rugged refractometer that’s temperature compensated and fully automatic. After only a few seconds and a few drops of sample, a high-contrast scale reads both specific gravity from 1.000–1.070, ±0.001, and ppt from 0–100, from 10–30°C with ±1.0 ppt accuracy. It also features an anti-corrosion, anti-roll design and comes with a case, calibration solution, and manual. The portable unit never requires...

Teflon Tape — $16.53
One wrap of tape provides vacuum tight seal with easy release.

Steel Wool — $9.85

3 Scalpel Handle — $5.75
For use with “ock-on” blades. Use with the #3 series of small surgical blades. Recommended for fine dissections. Stainless steel.

Double-SafeTM Thermometers, Range: -20 to +150°C, Length, mm: 305, Immersion: Total, Each — $22.55
Double-SafeTM Thermometers, Range: -20 to +150°C, Length, mm: 305, Immersion: Total, Each

Equilateral Prisms, Material: Glass, Side, mm: 25, Height, mm: 100 — $13.00
These prisms are polished on all faces. They are made of shatter-resistant acrylic material or optical quality glass. The length of the sides and the height are given for each prism.

Screen Tops, 51/2 16" — $9.90
Convert your aquarium into a small animal cage. Super durable screening in sturdy frame. Order secure clips separately.

Chalk, Pastel Fluorescent, Pkg. of 12 — $13.75

Human Chromosomes — $24.99

TI-89 Titanium Graphing Calculator, ViewScreen Compatible TI-89 Calculator — $238.00
The TI-89 Titanium features 16 preloaded Apps, 188KB of RAM, 2.7MB of Flash ROM, a built-in USB port with cable and an operating manual on CD. Other features include: up to 99 graphing equations defined and saved for each graphing mode, numericevaluation of functions in tables and data variable format, and interactive analysis of function values, roots, maximums, minimums, integrals, derivatives, intersections,inflection points and arc lengths. Includes connectivity cable and Connect™ software forinformation...

Aluminum, Regular Foil, 12″ x 25′ Roll — $3.25

Celestron PowerSeeker 60AZ Refractor Telescope — $119.00
* 2 1/3″ aperture. * 3X Barlow lens. * 700mm focal length; ƒ11.67. * 4mm and 20mm eyepieces. * 35X or 175X magnification. * Weight: 7 lbs.

WEATHERING AND EROSION DVD — $53.00
Add color, vitality and an extra dimension to earth science classes with this teaching DVD. Combines full-motion color, live video, and computer graphics with a complete teacher's guide. Teacher's guides include discussion questions, class activities and glossaries.

Photon” Solar Racer Kit — $26.00
Have your students build their own Solar Racer! This easy-to-assemble kit comes with everything needed, including high-powered solar cell and a 1/2 amp solar array and high amp motor for speedy acceleration. Transparent plastic body can be custom painted. When exposed to full sun, the photon racer travels 3m in 6 secs on a smooth, flat surface. Size: 21.5cm L x 10.2cm W x 5.1cm H.

Bug Jug — $7.00
This escape proof insect habitat allows for safe and easy viewing. Plenty of room inside for bugs, leaves and grass for a natural environment. Dome and base are vented. Detachable feeding tower becomes an insect collector. Complete with magnifying glass, liquid feeder, water pond, caps and fully illustrated Bug Watcher’s Handbook. Size: 7" dia. x 8" H.

Volcano Model — $159.09
Cutaway Section Shows Flow of Magma A truly realistic representation, the handpainted resin model features a vertical section for students to view the path that magma takes on its upward course through the volcano. It is securely mounted on a sturdy base. Size: 17 3.4"L x 16 1.2"W x 11"H.

4 Scalpel Blades, 22 2 15/16″ Pkg/10 — $4.00

Pyrex® Erlenmeyer Flasks, 500mL, Pkg. of 6 — $31.65

Curved Point Forceps with Medium Tips — $2.20
Ribbed sides and tips with stainless steel for easier reach. Length: 4 1/2″.

Frigimat® Cub Dry Ice Maker — $369.78
Attach this compact unit to a liquid CO2 cylinder and in a few minutes you’ll have a ready-to-use 250–350g block of dry ice. Dry ice production can be viewed through a translucent polycarbonate body that opens without clamps or screws. The system operates multiple pressure relief safeguards. Weight: 4.8 lbs.

U-Form Electromagnet — $23.55
This unique electromagnet consists of an iron Ushaped core with armature and a carrying hook. Wound with insulated copper wire and provided with barrel connections, the electromagnet is designed for use on 4–6 volts DC.

Current Clamp (600A AC/DC) W/ BNC — $163.35
DC 0 to 600 A ± (2% reading +2A). AC 0 to 300 A ± (2% reading +2A). AC/DC 300 A to 500 A ± (3% reading +2A). AC/DC 500 A to 600 A ± (6% reading +2A). Voltage output 1 mV per 1 A (0 to 600 mV AC & DC). Max conductor size 30 mm.

Banana Plug Connectors, Red — $28.80

FUNdamentals of Physics Simple Machines — $110.00
The unique stop system of this device allows students to load masses on the lever arm without it falling. Gears with 12, 24, and 36 teeth, then allow students to investigate the advantage behind different gear ratios. Experimenting with different setups, students discover the mechanical advantage of gears and three types of levers. You can also challenge students to devise a way to lift a mass using the least amount of force. Includes four gears, rwo levers, mounting hardware, and teacher and student...

Pyrex® Standard Griffin, Low Form Beakers, Capacity: 250 mL, Pkg. of 12 — $42.57
Corning 1000 Manufactured with spout and uniform wall thickness for maximum durability. Larger sizes (over 250 mL) have double graduated measuring scale. All have large marking spot. 10 mL size is not graduated.

Polypropylene Narrow Mouth Bottles, Capacity: 60 mL, Pkg. of 12 — $18.85
Polypropylene Narrow Mouth Bottles, Capacity: 60 mL, Pkg. of 12

Skull Models Allosaurus — $67.50
Scale: 1:4; size: 7 1.8"L x 6 1.2"H; weight: 1 lb., 13 oz.

Inflatable Mannequins Foot Pump — $5.00
Inflatable Mannequins Quickly and realistically stage your classroom crime scenes. Made of duarable plastic, each mannequin is lightweight and easy to set up and manuever in position.

Thermometers, Stainless Steel — $4.95
To ensure that water is being maintained at the proper temperature, a thermometer is essential. It is also needed when transferring fish from one aquarium to another. Choose between four different styles of dual range (F°/C°) thermometers.

Hemacytometer — $279.75
High-quality, easy-to-read Neubauer chamber gives rapid and accurate counting of red and white blood cells. Constructed from one piece of thermal and shock-resistant glass, it has two counting chambers with double improved, brightline Neubauer rulings. Complete set includes counting chamber, two cover glasses, one red cell pipet, one white blood cell pipet, tubing and plastic carrying case.

The Ear — $22.80
Illustrates organs of hearing and balance; details components of outer, middle and inner ear.

Vinyl Disposable Gloves, Powder-free, Size: Medium, 7 to 8 — $18.80
Strong, thin, form fitting gloves are designed for a skin-tight fit on either hand. Comfortable, with a sensitive response. Supplied in a package of 100 gloves.