IOWA ACADEMY OF SCIENCES. 
89 
A STUDY OF SOME COTTON SEED OILS. 
J. B. WEEMS. H. N. GRETTENBERG. 
In connection with an investigation which w r as recently 
made at the Experiment Station it became necessary to 
investigate a number of cotton seed oils, which were pre- 
pared for general use. When it is realized that cotton 
seed oil, which 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 Oil” Intended for use when 
oil is desired for cooking purposes. 
Sample No. Ill — “Snow Flake.” 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. VH -Common Oil , known as “Summer White.” 
Sample No. VI — Labeled “Summer Yellow.” 
Sample No. YII— Labeled “Winter Yellow.” 
Sample No. Till —“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 93°-100°C 867— .873 
Saponification Equivalent 190.8 — 209. 7mg 
Iodin Number 102 — 111 
* Commercial Organic Analysis, Vol. 2, pt. 1, p. 93. 
