GENERAL DIRECTIONS ix 



9. Do not write notes on the drawings. Write them on separate pages and 

 insert them next to the drawings to which they refer. 



10. Students who declare that they "cannot draw" will receive little sym- 

 pathy. Anyone can make the simple line drawings required in this work. To 

 make a drawing proceed as follows. First determine how large it is to be and 

 select a proper space on the page. Then rule this space with very light vertical 

 and horizontal guide lines so that your drawing will be symmetrical. With a 

 ruler further reduce or enlarge the length or width of the actual object to fit the 

 space selected. Then with very light lines make an outline of the object; then, 

 constantly referring to the object, correct this with light lines until the propor- 

 tions and details are as nearly like the object as you can possibly get them. 

 Then erase the light lines until you can barely see them, and go over them making 

 the final lines firm and clear. Every line upon the drawing must represent a 

 structure actually present on the object. Avoid shading, color, crosshatch- 

 ing, etc. 



Notes 



1. Whenever desirable, notes are to accompany the drawings and are to be 

 written on separate sheets which are to be inserted in the notebook adjacent to 

 the sheet containing the drawings. 



2. Avoid detailed notes containing material in the laboratory outlines. 



3. The notes will consist of: 



a) Answers to questions contained in the laboratory outlines unless such 

 questions are obviously answered in the drawings. 



6) Additional explanations, original observations, or comments upon any 

 of the laboratory work as the student sees fit. 



c) Complete accounts of experiments performed in the laboratory, whether 

 individual or demonstration. This account should follow some such plan as 

 this: (i) purpose of the experiment, (2) observations and results, (3) conclusions 

 and explanations. 



4. It is preferable but not compulsory that the notes be written in ink. Write 

 on one side of the paper only. 



Additional Miscellaneous Directions 



1. The letter (^4) signifies consult the assistant; CR), consult a textbook; 

 (L), the matter will probably be discussed in the lectures. 



2. Right and left refer to the animal, not to the student, unless so stated. 



3. All work is to be individual unless the supply of material is insufficient. 



4. When handling small living animals with a dropper be sure that the dropper 

 has never been used for chemicals. Have one dropper plainly marked which 

 you use only for water or other harmless solutions. It has often happened that 



