CHAP. VII.] 



THE CONNECTIVE TISSUES. 



265 



OH ) 



n aT Ti" Af 0> which when saponified by boiling with caustic potash yields 



^27^53 "J 



OH") 

 ceryl-alcohol 27 jr Y O, which is one of the series of primary alcohols, and 



cerotic acid, C 27 H 54 0, which is the normal fatty acid corresponding 

 to the above alcohol. In addition to ceryl-cerotate, free cerotic acid is 

 contained in bees' wax. 



In the portion of bees' wax which is insoluble in alcohol there is 

 contained myricyl palmitate, an ether derived from myricyl alcohol 



H 



Analysis of the Fats. 



A weighed quantity of the finely divided tissue in which 

 and^determi 1 - ^e ^ a * s are * ^ e separated and determined is evaporated 

 nation of the to dryness in a water oven. The dry residue is then boiled 

 with ether for a long time. The process may be carried 

 on in a flask connected with an inverted condenser, the 

 flask being heated on the water-bath. The apparatus shewn 

 in Fig. 52, which was devised by Dr Drechsel 2 , is perhaps superior to 

 any other for the extraction of fats from animal matters. At A is a 

 flask containing ether, into which is fitted a tightly-fitting cork or stopper, 



Extraction 



total amount 

 of fat in a 

 tissue. 



Fio. 52. PRECHSEL'S APPARATUS FOR THE EXTRACTION OP FATS. 



perforated so as to allow the lower end of the bulb B to fit into it. 

 B is closed by a stopper. Into B can be passed a plaited filter such as 

 is shewn in the cut, and into this filter the solid is placed from which 



1 Consult Schorlemm er's Organic Chemistry, p. 174. 



2 Drechsel, Journ. f. prakt. 'Chemie, Vol. xv. (1877), p. 350 and Plate n. 



