CHAPTER II. 
MATERIAL FOR STUDY. 
In order to study the activities of animals it is neces¬ 
sary (i) to have apparatus, (2) to collect many forms 
of animal life and provide suitable conditions for them, 
and (3) to prepare and preserve specimens. All work 
of this kind can best be done by the members of the 
class. It is a good plan for small groups of volunteers 
to assume responsibility for carrying out the directions 
of the several paragraphs which follow. 
APPARATUS AND REFERENCE BOOKS. 
Not much apparatus is needed. A net for collecting 
insects may be made by bending a piece of telegraph- 
wire into the shape indicated in Fig. 1, fastening it to 
Fig. 1. — An Insect-net. Drawn by A. E. Sanford. 
a pole, and sewing it into a bag made of mosquito¬ 
netting. For water collecting, a tin strainer attached 
to a wooden handle answers admirably. Fruit-jars and 
jelly-tumblers with tin covers make good collecting 
vessels. A few books should be at hand for reference. 
Bulletin No. 39, U. S. National Museum, can be had 
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