APPENDIX. 



A. 



THE USE OF THE LABORATORY AND LABORA- 

 TORY APPARATUS. 



OBSERVANCE of the following regulations will facilitate lab- 

 oratory work : 



During laboratory hours work, walk, and talk quietly, that 

 your co-laborers may not be annoyed. 



Handle microscopes and other instruments with care, 

 keeping them clean and in order, and always, after using, 

 return them to their proper places. 



Instruments that are the property of the laboratory should 

 be used with especial care, and never retained longer than 

 is necessary for the immediate work in hand. On returning 

 the same, be sure that it is to the proper place. 



Reagents should be used sparingly, corks or stoppers 

 returned to the bottles to which they belong, and the bottles 

 returned to their proper places. Never pour back into the 

 " stock bottle " any reagent that has been once made use of. 

 Take care that your hands do not soil the label of the bottle. 

 (It is well to wipe the lip of the bottle before and after 

 pouring out the liquid.) 



H3 



