LABORATORIES AND THEIR EQUIPMENT 



the term to the students, who should be held fully 

 responsible for their good condition. 



In an elementary course few reagents are used, 

 and these so rarely that it is better to place them on 

 the tables only when needed. The best reagent 

 bottles known to me are those in which a pipette 

 forms the ground glass stopper, 

 as shown in the accompanying 

 figure (Fig. 8). These bottles 

 and other dishes and miscella- 

 neous glassware are happily in- 

 expensive, and may be obtained 

 from any of the firms dealing 

 in chemical supplies. 



Apparatus for physiological 

 experiments must partly be 

 made to order from directions 

 given in books, and partly 

 bought ; and most of the needed 

 supplies may be purchased from 

 the firms mentioned below. 

 Most of the articles are not 

 used up, but once obtained are 

 valuable year after year. There is no firm known to 

 me which makes a specialty of apparatus for plant 

 physiology, though no doubt, in view of the rapidly 

 increasing attention given to this subject, that lack 

 will soon be supplied ; and it will not be long before 



FlG. 8. An excellent form 

 of reagent bottle. 



