"The Mystery of Lyle and Louise"

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.

Explore alternation of generations.

This organism is commonly recovered from soil and water. As normal intestinal flora, it can also usually be found in sewage.

Paramecium caudatum is a common protist that inhabits a variety of aquatic ecosystems.

This organism is easily recognized by its trumpet-shape and blue coloration. It is quite large (approx. 2 mm) and is a good option for students that are just starting to look at the microscopic world.

Characterized by a lack of rigid cellulosic walls, instead these organisms have pellicles made of protein. They store paramylon instead of starch.

This organism can be isolated from soil, wounds, and intestinal tracts of humans. It digests protein and is known for its strong, distinctive odor.