26 



The apparatus constructed for this purpose by the author is ar- 

 ranged as follows : 



^ is a flask of from 5 to 6 centimeters in width and 6 to 7 cen- 

 timeters in height. On this stands the funnel B, the neck of the 

 funnel being carefully adjusted into the neck of the flask by 

 grinding. The funnel is from 6 to 8 centimeters wide and from 

 8 to 10 centimeters high. The upper edges, d d, of the funnel 

 are bent outward to allow of an easy adjustment of the cork, and 

 the lower aperture must remain of full width, and should not 

 be narrowed down, as is often done.* The filter containing the 

 precipitate is then loosely inserted into the funnel, which then is 

 adjusted to the previously weighed flask. The filter is now washed 

 with some absolute alcohol to remove the last traces of moisture 

 from the precipitate. The beaker, which had been used for the 

 coagulation, and which had been set aside, is now freed from fat 

 by repeatedly washing it with small quantities of ether, which are 

 poured upon the filter. This is continued until the flask is filled 

 to about one-half with ether. 



The apparatus is then, by means of a good cork, free from 

 pores,f connected with an inverted Liebig's cooler, and put upon a 



* An ordinary wide-necked flask, to which the funnel is attached by means 

 of a good cork, may serve in the place of the complete apparatus, as described. 



f Corks may be prepared by covering the outer surface with silicate of 

 . soda. 



