APPENDIX II 



LABORATORY EQUIPMENT AND METHODS 



Equipment of laboratory. The equipment of the 

 laboratory or classroom will, of necessity, depend upon the 

 opportunities afforded the teacher by the school officers to 

 provide such facilities as instruments, books, and charts. 

 If dissections are to be seriously and properly made, 

 however, some equipment is indispensable. Flat-topped 

 tables, not over 30 inches high, a few compound micro- 

 scopes (one is much better than none), as many simple 

 lenses, or, far better, simple dissecting-microscopes, as 

 there are students, dissecting-dishes, a pair of bone- 

 clippers, one injecting-syringe, a bunch of bristles, water, 

 a few simple reagents and some inexpensive glassware, 

 as slides, cover-glasses, watch-crystals, and fruit- or 

 battery-jars for live cages and aquaria, make up a suffi- 

 cient equipment for good work. Much can be done with 

 less, and perhaps a little more with some additional 

 facilities. 



The dissecting-pans should be of galvanized iron or tin, 

 oblong, about 6x8 inches by 2 inches deep, with 

 slightly flaring sides. If an iron wire be run around the 

 margin, and the margin bent back over it, it will 

 strengthen the dish, and make a broader and smoother 

 edge for the hands to rest on. Diagonally across the 

 dish, about one-fourth inch from the bottom, should run a 

 thick wire. A layer of paraffin one-half inch thick 



