92 THE CONNECTICUT POMOLOGICAL SOCIETY. 



This price is extremely high. Fish oil of good quality may 

 usually be obtained for about 30 cents per gallon! 



Caustic Potash. 

 Caustic potash of commerce is usually either in stick form 

 or in coarse lumps. If either of these forms is used, it must 

 first be dissolved in its own weight of hot water. The most 

 convenient form, however, is that known as "granulated" or 

 "ground" caustic potash, in which form it may simply be added 

 to the other ingredients, without the addition of water. Much 

 of the caustic potash in commerce contains large quantities 

 of caustic soda. This is not a serious objection, but the pres- 

 ence of soda tends to make the emulsifier thick. Babbit's lye^ 

 commonly used for making soft soap, and composed almost 

 wholly of caustic soda, has been successfully used. The potash, 

 however, gives uniformly better results and is recommended. 

 The General Chemical Co., 608 The Bourse, Philadelphia, 

 Pa., produces an excellent quality of "ground caustic potash, 

 92%," at eight cents per pound by the hundred, or at 10 cents 

 in smaller quantities. 



Rosin Oil. 

 Rosin oil is a heavy vegetable oil produced as a by-product 

 in the maimfacture of turpentine, and is largely used in the 

 manufacture of varnish. There seems to be a confusion of 

 terms as applied to this oil. Four distinct grades, first run, 

 second run, third run, and fourth run, are recognized. Some 

 firms quote the first run as highest in price, while others quote 

 it lowest. It is sufficient for us to know, however, that the 

 lowest priced grade suits our purpose as well as, if not better, 

 than the higher-priced grades. The American Naval Stores 

 Company, 21-24 State Street, New York, the largest distrib- 

 utors of this commodity in the country, quote first run (low- 

 est grade) at 23;^^ cents per gallon by the barrel. 



Crude Petroleum. 

 Crude petroleum varies greatly in composition, due chiefly 

 to the widely separated sources of supply and partly to the 

 variable product of the individual well. Sometimes it con- 



