548 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



pounds of molasses. About five ounces of gutta-percha cut 

 into small pieces are then to be melted, and, after fusion, 

 eighteen ounces of olive oil added, together with two to three 

 ounces of stearine, when the solution is complete. This warm 

 solution is to be stirred thoroughly into the first mixture, 

 and nine ounces of gum-arabic, dissolved in forty-five ounces 

 of water, then added. To supply an agreeable odor, a few 

 drops of essence of rosemary or lavender may be stirred in. 

 For use, this polish is to be mixed with three or four parts 

 of water and applied to the leather, to which it communicates 

 a brilliant lustre, and improves its durability and suppleness. 

 -9 B, March 14,1872,361. 



PREVENTION OF MOULDINESS IN GUM. 



It is said that solutions of gum can be kept from becoming 

 mouldy by adding a few drops of sulphuric acid. A little 

 alum also has a decided effect. 22 A, August 31, 1872, 210. 



