XX INTEODUOTION 



7. Good -work cannot be done with dull instruments, 

 therefore keep them clean and sharp. 



8. When work is finished for the day, all instruments 

 which have been used should be washed, or wiped with a 

 damp cloth, to remove all adhering scraps of flesh, thor- 

 oughly dried with a soft cloth, then carefully oiled or rubbed 

 with vaseline. The joints of the scissors should receive close 

 attention. 



It is a good plan to require each student to prepare a 

 careful dissection of some animal or system of organs. These 

 preparations may be used to form a laboratory museum. 



Taking Notes 



A complete and carefully prepared description must be 

 made of every specimen examined. This description will 

 consist mainly of answers to the questions given in the 

 manual. To these are to be added whatever independent 

 observations the student may make. If the answers be 

 given in the same order as the questions are asked, it will 

 be found that the former constitute a brief essay upon the 

 organism examined. 



Two note-books should be used, one in which to write 

 hastily in the laboratory the results of the observations 

 made ; the other to contain the carefully prepared descrip- 

 tions which, written plainly in ink and with due regard to 

 rhetorical form and expression, are intended for examina- 

 tion by the instructor and for permanent preservation. 

 Make the laboratory notes full and complete, record the ob- 

 servation as soon as it is made, leave nothing to the mem- 

 ory; otherwise the second set of notes will suffer. In an- 

 swering such questions as are mainly theoretical, give all 

 the reasons you can pro and con. 



DraTTing 



Draw every specimen examined and every dissection 

 made. Endeavor to get correct outlines and relative posi- 



