OIL AND ITS Sl'JJSTnTTKS. 



TABLK XXXIII. 



I-oi'l'Y OIL. 



LINSEED OIL. 



OLIVE OILS OF KNOWN ORIGIN. 

 CALIFORNIA OILS. 



The oils in Tables XXXIV and XXXV were obtained principally 

 from producers of established reputations and were accompanied by 

 affidavits as to purity. Three samples, made at the station, were 

 obtained from G. E. Colby, of the California Agricultural Experi- 

 ment Station. The oils reported on are from all parts of the State 

 devoted to olive culture and represent practically all the different 

 existing soils and climatic conditions, which undoubtedly exert a great 

 influence on the chemical and physical characteristics of the samples. 



The results give a good idea of the variability of California oils. 

 The analyses are more complete than any previously published data 

 on this subject, which gives them added value in determining the limits 

 of the various values. The per cent of free fatty acids eliminates two 

 oils which would otherwise give an extraordinary variation to the spe- 

 cific gravity and index of refraction figures, a variation that is certainly 

 not legitimate for the grade of oils considered here. Oils such as Nos. 

 22619 and 673 are not n't for use as salad oils, as they contain 44 and \'2 

 per cent of free acid respectively. This factor should always be taken 

 into consideration in reporting low results on specific gravity and refrac- 

 tive index. The variety of olive and the climate and soil may greatly 

 affect the oil; how much these factors ailed the product must be decided 

 by further study. Six >amples of oil (No-. 28466, 8&1, *.".:'.. I'- K>7. 882, 

 and ,s:i4) -how the uniformity of oils produced from different varieties 

 of olive where, the soil and cl i nia t ic cond it ions are the same and the same 

 process of manufacture is used. The first three were made from Ital 

 ian varieties and the la>t three from the Mis-ion olive. The Mission 

 olive, introduced into California b\ the old Mi-sion father.-, is the 

 variety generally grown in the State, and most of the oil made comes 

 from it. Table XXXVI gi\e- the compiled results of analyse- of 

 California oils. 



