12 DIRECTIONS TO THE STUDENT 



drawings are rejected simply because the pencil was too dull 

 for you to bring out the structures you wanted to show. Every 

 line you make on the paper should mean something. Draw 

 with a firm, bold, continuous stroke. Do not sketch. Do not 

 try to shade, unless you are an artist. 



Use the scale indicated in your laboratory directions : thus 

 X 2 means that your drawing is to be made twice natural size. 

 Learn to use the metric system in making your estimates of 

 distance, weight, etc. 



Above all things be accurate, careful, and neat. Fifty pages 

 of notes and drawings carefully prepared are worth more than 

 one hundred placed carelessly or hastily on the pages. Your 

 laboratory exercises are in part a training for more accurate 

 and careful science work in the later years of the high school 

 and in college. This is the time and the place for you to 

 learn how to do scientific work, and scientific work is synony- 

 mous with accuracy and carefulness. 



