INTRODUCTION. XI 



of the snake, turtle, and a few of the forms that cannot 

 usually be obtained in sufficient numbers to supply the 

 whole class, and to make some of the finer points clearer, 

 especially when the time is short ; but each pupil should 

 do most of this work independently, with occasional sug- 

 gestions from his teacher. 



If the school does not furnish a microscope, get one 

 yourself. 



TO THE STUDENT. 

 For this work you need : 



1. A small pair of forceps. 



2. A small pair of scissors. 



3. A knife. 



4. Two dissecting needles, made by thrusting the eye 

 end of a large needle into the end of a pen-holder. 



5. A hard pencil for drawing. 



6. A good pair of eyes. 



Keep these all sharp, especially number 6. 



7. A lens, such as the three-legged lens, or the linen- 

 tester. 



8. A scratch-book in which to take notes while studying 

 the specimens. Keep this and number 5 in the 

 drawer of your work table. 



9. A note-book, in which descriptions of the animals 

 studied should be carefully written in ink. 



10. A bottle of mucilage (for every four students). 



11. A quart fruit-jar. 



In drawing, first trace the outlines ; then if these seem 

 correct when carefully compared with the object, make the 

 lines heavier. Avoid shading. See Morse's " First Book 



