art THE FROG 
should not be compelled to refer to the directions to find out what 
question is being answered. It is not required that all the ob- 
servations called for in the laboratory directions be recorded, since 
this would involve too much repetition of statements already made 
in the directions. 
3. In all laboratory notes pay particular attention to topical 
headings and to paragraphing. The paragraph should possess 
strict unity of subject matter. 
4. Notes should be written in ink and only one side of the paper 
should be used; the writing should appear on the right-hand page 
of the open book after the paper is filed in the covers. The other 
side of the sheet may be used for the explanation of drawings 
(see below). 
5. The notes should be written in permanent form at the time 
the observations are made. The pages should be numbered con- 
secutively, using Arabic numerals. 
C. Drawings.—1. Make the drawings of sufficient size to show 
all the details clearly. Do not crowd the drawings; a wide margin 
‘should be left on all sides. 
2. The drawings are mainly outlines, and the lines should be 
sharp, clear and even—not broad, soft or irregular in width and 
distinctness. See that the pencils are kept sharp. In making 
outlines be careful that the ends of the lines meet accurately, 
not overlapping or crossing. Never leave two lines where only 
one is intended. Leave no gaps in outlines, but draw even small 
granules with a complete and perfect contour. The drawings are 
usually semi-diagrammatic, emphasizing certain features to be 
made clear to the exclusion of others; this may necessitate arrang- 
ing the parts in a somewhat unnatural order. 
3. Care should be taken to represent the proportions accurately. 
It is ‘advisable to outline the drawings very faintly at first, so 
that the lines may be readily erased if necessary. In doing this 
use a very sharp pencil, preferably a hard one (5H). After the 
correct form is secured, all lines should be made sharp and clear. 
If the object you are drawing is bilaterally symmetrical, draw a 
faint line down the middle of the paper to represent the axis of 
bilateral symmetry; this line will aid in keeping the two halves 
alike, and may afterwards be erased. 
