GENERAL METHODS. 



also for other uses. These contain, as Fig. 9 shows in sec- 

 tion, a glass drainer which rests on 

 three small glass feet and has in its 

 bottom many perforations which be- 

 come wider downward. The outer 

 box serves to enclose the objects air- 

 tight, for other uses.* 



If many objects are to be washed at 

 the same time in running water, a use- 

 ful aid is the washing device which was set up two years ago 

 (1890) in this botanical institute, and which has proved very 

 satisfactory. 



This apparatus, whose construction is readily understood 

 from the accompanying Fig. 10, consists essentially of a 



FIG. 9. Steinach's draining- 

 box in vertical section. After 

 Steinach (I). 



FIG. io. Washing apparatus. 



brass tube a provided with nine small cocks and the zinc 

 vessel d for the reception of the objects to be washed. But 

 since the small cocks cannot sustain the full pressure of the 

 water-pipes, the complete shutting off and the approximate 

 regulation of the water pressure may be accomplished by 

 means of the large cock b, which, by means of a T-tube, as 



* These boxes can be obtained of R. Siebert, Wien VIII, Alserstr. 19, and 

 latterly also of Dr. Griibler. The latter furnishes the glass drainers alone at 

 Mk. 1.25 (31 cents) each. 



