"SILICO & chemical PORCELAIN SE"

This kit teaches the student how to determine the evolutionary closeness of organisms based on antigen-antibody blood analysis.
Immunological comparisions (homology) are perhaps the most fascinating of the five methods by which organisms are classified.

Snap Circuits Motion contains over 50 parts and over 165 projects to complete, all motion and physics focused.

Y-shaped connector with a 120° angle provides safer connections as the ends have constrictions to hold rubber tubing securely.

Octagon magnetic stirring bars with integral pivot ring are the most commonly used shape.

Funnels are made of durable plastic. Funnels of top inner diameter 70-108 are polypropylene and autoclavable. Funnels with top inner diameter of 127 and 165 are polyethylene and not autoclavable.

The 165 mm size has a wide stem for quick transfers.

Welded steel, zinc plated. Consists of two shelf levels for guides and a third elevated bottom shelf on which the tubes rest. 40 positions, in four rows of 10 holes each, accept tubes up to 22 mm diameter. Dimensions: 3-1/8" H x 10-5/8" W x 4-3/4" D.

The cork borer set includes 12 borers, in sizes ranging from 4.8 to 21 mm.

A time saver that eliminates mouth pipetting!
The Bel-bulb Pipettor is simply held against the pipette end and fluid is drawn up.

Transfer corrosive, toxic or sterile liquids safely with this pipette filler. Three separate labeled valves make filling and emptying the pipette a simple procedure.

Easy to carry, simple to operate and sufficient for most field pH tests.

Set of 54 Includes twenty 1 g (blue), twenty 5 g (red), ten 10 g (yellow), and four 20 g (green) weights. These colored and coded stacking masses help children see mass relationships at a glance. Each color represents a different thickness and mass. Includes plastic storage box.

For physics experiments and demonstrations such as kinetic, density and volume measurements, pendulum bob, potential energy and conservation experiments, ballistics etc. Solid ball, 1-1/2" (40mm) diameter. Made of Steel. Sold as a pair. Comes with a Teacher's Guide.

The rounded, differently sized stones make your tank look like a stream bed.

Attractive Bottom Cover Enhances Natural Filtration and Nitrogen Cycling
Gravel contains no lead or chrome and won’t change the pH or chemistry of the tank. Pebble sizes up to 1/4" dia.

Fast and easy-to-use, this kit contains two dropper bottles for accurate dispensing of test solutions, non-staining test tube with snap cap, and instructions. It comes with enough solution for 130 tests and can be used in either fresh or salt water. Range: 0–8 ppm ammonia.

These litmus test sheets are available in litmus red (ACS) or litmus blue (ACS).

Nine level conductivity meter shows the relative conductivity/resistance of liquids and solids. As the conductivity of the tested material increases, the number of glowing red LEDs will increase to a maximum of 8, which indicates a very good conductor. There will be zero glowing red LEDs if the material has a very low electrical conductivity (is a good insulator).