"The Mystery of Lyle and Louise"

Primer balances are the perfect scales for budding scientists.

Illustrate the Chemical Variety in Soil

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

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.

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.

Dress up your classroom or school foyer.

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

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.

Demonstrate amoeba structure, locomotion, and feeding behavior.