APPENDIX 



IN the laboratory exercises many directions were given 

 for obtaining and treating the animals studied. But cer- 

 tain apparatus, reagents, and methods are demanded in the 

 work that we could not speak of there. These we shall dis- 

 cuss briefly and simply in the following paragraphs. 



EQUIPMENT. For practical work in dissection, a well- 

 lighted room, furnished with steady, flat-topped tables, 

 from 28 to 30 inches high, is needed. For some of the work, 

 compound microscopes (Fig. 1, page 6) are a necessity. Ex- 

 cellent ones can be bought for $25 or $30 apiece. If one or 

 more of these cannot be had, some of the exercises must be 

 omitted. Simple microscopes with simple lenses may be 

 obtained at a small expense, and are a great aid. With 

 the microscopes, should be provided glass slides, cover 

 glasses, and watch crystals. Forceps with corrugated points 

 and scissors with straight and curved points, should be 

 accessible to the student, being furnished either by himself 

 or by the school authorities. The student should also have 

 a scalpel, paper of ribbon pins, and dissecting needles 

 (Fig. 2) . The dissecting needles may be made by forcing 

 steel needles, head first, into the ends of neatly rounded 

 pine sticks of appropriate size for handling. If possible, 

 dissecting pans of good tin or galvanized iron, about 5 by 

 8 inches, and 2 inches deep, with flaring sides, should be 

 provided for use in certain dissections. Across the pan, 

 J inch from the bottom, solder a wire, then run melted 



95 



