"The Mystery of Lyle and Louise"

Primer balances are the perfect scales for budding scientists.

Illustrate the Chemical Variety in Soil

At approximately three times life-size with four removable parts, this model offers a comprehensive view of the human ear. It has representations of the outer, middle and inner ear, featuring a removable eardrum with hammer, anvil and stirrup.

Set of nine brass hooked weights ranging from 10 to 1000 g, perfect for classroom or lab experiments. Supplied in a wooden block for easy storage.

This replacement high-concentration diamond wheel is six inches in diameter.

Solid, black stoppers contain a high percentage of pure rubber and weigh less than neoprene.

This hole punch has adjustable hole positions with accuracy and durability.

Premium line of glass lenses designed specifically for Universities.

Harvard Trip balances are two-pan balances designed for comparative weighing.

Dress up your classroom or school foyer.

Stainless steel hooked weights set with a capacity of 1000 g. Ideal for classroom or lab experiments.

Use as a starter kit or a refill.

Molded Polyethylene.

Use as a starter kit or a refill.

Organized, economical survey of fossils.

Use Sordaria fimicola to allow students to visualize the results of crossing over during cell division.