464 ZOOLOGY. 



will be able to furnish to teachers a limited number of sets of 

 the microscopic slides called for in this book. 



6. Laboratory Records. For making these the student 

 should have a note-book of unruled drawing paper of good 

 quality, which may be had in a tablet or kept as separate sheets 

 in an appropriate envelope; and good drawing pencils, kept 

 sharp, and of hardness suited to the paper. In the note-book 

 the student should keep, concisely and in an orderly way, the 

 record of all his observations, experiments, comparisons and 

 conclusions. The notes may be kept on detached sheets sim- 

 ilar to those used for the drawings, if desired. 



Outline drawings and diagrams must be made of every 

 structure or relation which can be shown by a well-labeled 

 sketch. Shading should be sparingly used and only with a 

 matured purpose, the result first being tested on a separate 

 sheet of paper. The name of each portion of the sketch should 

 be determined and named by running a leader from the part 

 to an appropriate place for the name. The drawings are al- 

 ways to be made in the laboratory and from the specimen 

 studied. It is through the judicious criticism of the drawings 

 that the teacher can best bring out the deficiencies in the stu- 

 dent's observations. One teacher cannot do justice to a labor- 

 atory section of more than ten or twelve students. A good 

 portion of the failure accredited in some quarters to the labora- 

 tory method is due to inefficient direction. The laboratory 

 will no more run itself than will the class room. 



It is very desirable that students keep a field note-book, of 

 size suitable for the pocket, in which all his own observations 

 should be entered and dated. These notes may be put into 

 fuller form in the reports called for in the body of the text. 

 It is chiefly through the encouragement of such work as this 

 that the teacher may hope to develop in his students a perma- 

 nent interest in natural history, which will contribute mate- 

 rially to their satisfaction in later life. It is thus that men and 

 women come to devote their lives to nature study. 



