"WardsSci000478"

Collect Insects from Shrubbery

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An introductory rock set contains six samples from each of the three major rock types.

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Study both an active alpine glacier and Its erosional effects.

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Painstakingly handpainted for accuracy and realism.

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Large, black, rounded tektite, 1 1/2". Thailand.

This combination unit indicates the inside and outside temperatures and the indoor humidity.

Light gray, earthy.

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White, fine, massive, opaque to slightly translucent.

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Measure relative humidity with weather bureau-type wet and dry bulb thermometers. Pocket-sized psychrometer is perfect for student use, as it presents no mercury hazards.

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Gray-to-brown basaltic, with over 50% vesicles.

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