4 LABORATORY DIRECTIONS IN 



is by the use of fine regularly placed dots (stippling). In pencil work, 

 an artist's tool called a blender may be used to secure an even gradation 

 of shading. 



4. Drawings and Legend. The pages or "Plates" of drawings 

 should be numbered consecutively through the course with Roman 

 numerals, in the upper right-hand corner (Plate I, Plate II, etc.). The 

 student's name should appear in the upper left-hand corner. The indi- 

 vidual structures in a drawing may be labeled with the initial letter (or 

 first two letters) of their names, and an explanatory legend be placed at 

 the bottom of the plate; or, if preferred, the entire names may be written 

 beside the figure. In the latter case, the labeling must be neat and so 

 inconspicuous as not to overshadow the drawing. If the drawing is done 

 with a pencil, the labeling should be done with a pencil. A neat style of 

 lettering for free-hand work is shown in Fig. 1. Refer to it if in doubt as 

 to the correct form of letters. 



ABCDEFGHIJ K L M 

 N P R S T U V W X Y Z 



abcdefgh/jk I m 

 nopqrstuvwxy z 



FIG. 1. The alphabet in suitable style for free-hand lettering. 



Do not crowd the drawings on the plate but plan the plate so that there 

 will be ample room for the drawings, the lettering, and the legend. 

 Always take a fresh sheet of drawing paper when beginning a new exercise, 

 so that drawings of two different exercises will not be found on one sheet. 



E. FILING AND CORRECTION OF THE REPORT 



At the conclusion of each laboratory period place all notes and draw- 

 ings, finished or unfinished, in an envelope, fill in the blanks on the face 

 of the envelope, and file the report in the place designated by the in- 

 structor. Notes and drawings must not bo removed from the laboratory 

 except by permission. They must be available for inspection at all t iiiu-s 

 xcrpt when I he student is actually working on them. At the time indi- 

 cated by the instructor for the completion of the study on each exercise 

 the report will be taken up, graded, and returned. The student, while 

 in the laboratory, should make the corrections indicated and then place 

 the work in an envelope where it is to be kept until the end of the-semester. 

 At that time the notes and drawings, arranged in proper order, must be 

 returned to the laboratory for inspection. 



