1894.] certain Indian Food Stuffs. 67 



bath, with a watch-glass at the mouth of the flask, the soap solution 

 is sometimes found to have a turbid appearance, and the Saponification 

 equivalent comes out rather low. 



Saponification number for Mutton-fat. 



The fat was melted over a water-bath and filtered to get rid of the 

 shreds of membrane, &c. 



1. 1"3906 gm. of fat were treated with 20 c. c. alcoholic potash and 

 heated over a water- bath for 15 minutes. 



20 c. c. KOH =16-2c.c.^HCl( Blank.) 



Excess of „ =6*0 ,, ,, 



G .... . 1 , 0-02805 X 10-2 xlO^ „.. , 

 Saponification equivalent = „ =20o'7 



2. 0*9318 gm. of the same sample treated with 20 c. c. alcoholic 

 potash, &c. 



20c.c. KOH = 16-15 c.c.^HCl (Blank.) 



Excess of „ =9'3 „ ,, 



Saponification equivalent = =2062 



Another sample op Mutton-fat. 



0-8354 gm. was treated with 20 c. c. KOH. 



20 c. c. KOH = 16-15 c. c. ^ HCl (Blank. ) 



Excess of „ =10-2 ,, ,, 

 .... . , . 5-95 X 0-02805x103 ^^.^ 

 Saponification equivalent = (\'9p\ i ~ 



Duplicate analysis of the same sample gave the number as 199'2. 



Saponification equivalent of oil op Sesame.* 



Sesamum indicum (Nat. Order : Pedaliace^.) 



1. 1-6835 gm. oil were heated over a water-bath with 20 c. c. alco- 

 holic potash solution for 15 minutes. 



2. 1-3145 gm. oil were heated as above with 30 c. c. alcoholic potash 



solution. 



N 

 20 c. c. KOH =16-2 c. c. -^ HCl (Blank.) 



.-. 30 c. c. „ =24-3 „ „ 



* The oil was extracted by nicaus of carbou bisulphide. 



