viii GENERAL DIRECTIONS 



6. Provide yourself with a copy of Holmes's Biology of the Frog. Hegner's 

 An Introduction to Zoology will be needed later. 



7. Select a place in the laboratory and write your name on the table with a 

 piece of chalk or paste a gummed label with your name on the table at the place 

 chosen. 



8. Present yourself with all of the foregoing materials ready for work at the 

 beginning of the first laboratory period. Do not handicap yourself at the start 

 by delaying to provide yourself with the necessary outfit. The microscope will 

 not be needed for the first few days. 



9. A box of slides will be issued to each student later in the course. Examine 

 them to see that none are broken or damaged. These slides are to be returned 

 at the end of the quarter, and a charge of 50 cents will be made for each broken 

 or injured slide. Students are requested to handle the slides with care. 



General Instructions Regarding Drawings 



1. All drawings must be made on good quality drawing paper with a hard 

 pencil. As experience has shown that hard pencil drawings are the most satis- 

 factory, no other kind will be accepted. 



2. All drawings must be made from the actual material, unless otherwise 

 directed, and completed in the laboratory. The making of rough sketches in 

 the laboratory to be completed elsewhere is unscientific, inaccurate, and not 

 permissible. Drawings copied from textbooks will not be accepted. 



3. The drawing should contain all structures mentioned in the outlines, as 

 only those readily found are called for. In case you cannot find any structures 

 mentioned, ask the assistants to help you. Put into the drawing only what you 

 have actually seen, and in case you were unable to find certain things make a. 

 note to that effect under the drawing. 



4. The prime requisite of a drawing is accuracy, i.e., it must resemble the 

 actual specimen before the student as closely as possible. Drawings are not 

 to be diagrammatized unless the outlines expressly direct to make them so. 

 Next to accuracy, neatness and good arrangement on the page are desirable. 



5. Make your drawings large enough to show clearly all details asked for; 

 students tend to make drawings too small. The more details called for, the 

 larger the drawing must be. 



6. Always keep the pencil sharp by means of sandpaper. 



7. Draw on one face of the page only, on the face which lies to your right 

 hand with your notebook open. 



8. Label fully. Label everything in the drawing regardless of whether the 

 same structures have already been labeled in some previous drawing. With a 

 ruler draw a straight line out from the object to be labeled and write or print 

 the label so that it is parallel to the top and bottom edges of the page. 



