Download e-book for iPad: Adventures with a Hand Lens by Richard Headstrom

By Richard Headstrom

ISBN-10: 0486233308

ISBN-13: 9780486233307

ISBN-10: 0844654795

ISBN-13: 9780844654799

Basically written consultant to looking at and learning plants and grasses, fish scales, moth and bug wings, egg circumstances, buds, feathers, seeds, leaf scars, moss, molds, ferns, universal crystals, etc.—all with a normal, reasonably cheap magnifying glass. 209 specific line drawings relief on your discoveries.

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Example text

Now recalling our knowledge of botany, 47 we discover that the pistil, an essential floral structure, is missing. The absence of a pistil at first appears to be something of a puzzle until we examine one of the shorter erect catkins. Here we find that each of the fleshy scales, with which the catkin is provided, encloses two flowers, each having. a pistil with a scarlet style. So there are two kinds of catkins on the alder, one having flowers with stamens only and the other with flowers having only pistils.

It will appear as a piece of transparent parchment divided into a number of areas by thickened structures (Figure 35). Since a wing is a saclike fold of the body wall, it obviously must consist of two walls, but, looking at it, you would never suspect that such is the case, the two walls having been so closely fused together that the wing appears as a single membrane. The dual nature of the wing may be seen, however, along certain thickened lines where the two walls remain separated. These thickened lines are hollow and form the framework of the wing.

As you view tl le tree hoppers through your lens, you will observe that the prothorax, which is the first segment of the thorax, the one next to the head, has been prolonged upward or backward or sideways according to the species you are viewing. It is this structure that nature has modified to produce the many strange and grotesque forms found among these insects (Figure 21). Besides catching the tree hoppers with your net you might look over the twigs of various trees and shrubs and when you find them, which is not an easy thing to do, you can pick them off with your fingers or knock them into your killing jar.

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Adventures with a Hand Lens by Richard Headstrom


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