IOWA ACADEMY OF SCIENCES. 



A STUDY OF SOME COTTON SEED OILS. 



J. B. WEEMS. H. N. GRETTENBERG. 



Ill connection with an investigation which w^as recently 

 made at the Experiment Station it became necessary to 

 investigate a number of cotton seed oils, wdiich were pre- 

 pared for general use. When it is realized that cotton 

 seed oil, wdiich is one of the cheaper oils, is used in many 

 cases for adulterating oils of a better class it is seen that 

 any data regarding this substance is of value to those 

 who are engaged in the analytical branch of chemistry. 



The samples which were investigated were of different 

 grades, as may be seen by the following outline: 



Sample No. I — ''Butter Oil.'' Probably could be used as 

 an addition to lard to lower the melting point of this sub- 

 stance and used in the manufacture of oleomargarine. 



Sample No. II — ''Cooking Oily Intended for use when 

 oil is desired for cooking purposes. 



Sample No. \ll—"S>ioir Flaked A good grade of cotton 

 seed oil intended for general use. 



Sample No. IV — Salad Oil. Prepared for use as a salad 

 oil and could be readily used for adulteration of olive oil. 



Sample No. V — Conuiion Oil, known as "Summer White." 



Sample No. VI — Labeled "Summer Yellow." 



Sample No. VII— Labeled "Winter Yellow." 



Sample No. YUl "Crude Oil.'' 



Sample No. IX — Purchased in New York market as com- 

 mon "Cotton Seed Oil." 



Allen* gives the standards for cotton seed oil as follows: 



Specific Gravity 9S°-100°C 867— .873 



Saponification Equivalent 190.8-^209. 7mg 



lodin Number 102—111 



'Commercial Organic Analysis, Vol. 2. pt. 1. p. 93. 



