THE POTATO 287 



mixed with alcohol to denature it is extremely 

 large, and that particular denaturing agent should 

 be selected which is best adapted to the special 

 use to which the denatured alcohol is to be put. 

 Among the substances which have been proposed 

 are the following: 



"Gum shellac (with or without the -addition of 

 camphor, turpentine, wood spirit, etc.), colophon- 

 ium, copal resin, Manila gum, camphor, turpen- 

 tine, acetic acid, acetic ether, ethylic ether, methyl 

 alcohol (wood alcohol), pyridin, acetone, methyl 

 acetate, methyl violet, methylene blue, anilin blue, 

 eosin, fluorescein, naphthalene, castor oil, benzin, 

 carbolic acid, caustic soda, musk, animal oils, etc. 



"The materials and the quantities which are 

 employed depend upon the purposes for which 

 the denatured alcohol is to be used. There are 

 many technical uses of alcohol, however, in which 

 the pure alcohol only can be employed, and it is 

 a question to be decided by the Bureau of Inter- 

 nal Revenue whether such use of pure alcohol can 

 be permitted under the existing law. 



"The raw materials from which alcohol is made 

 consist of those crops grown upon the farm which 

 contain sugar, starch, gum, and cellulose (woody 

 fibre) capable of being easily converted into a 

 fermentable sugar. Alcohol as such is not used 

 as a beverage. The alcohol occurring in distilled 

 beverages is principally derived from Indian corn, 

 rye, barley, and molasses. Alcohol is also produced 

 for drinking purposes from fermented fruit juices, 

 such as the juice of grapes, apples, peaches, etc. 



"The term ' alcohol ' as used herein and as gener- 

 ally used means that particular product which is 

 obtained by the fermentation of a sugar, or a 

 starch converted into sugar, and which, from a 



