Minor Cereals, Oil-bearing and Leguminous Seeds. 151 



tein in tlie new-process meal were digestible. Tlie lower digesti- 

 bility of the new-process meal is doubtless due to the action of 

 steam used in driving off the naphtha^ as heat has been found to 

 lower the digestibility of nitrogenous compounds in food sub- 

 stances generally. Because of the more complete extraction of the 

 oil, new-process meal contains more protein than does old-process. 

 Because of the lower digestibility of new-process meal, a given 

 weight of this feed contains somewhat less digestible protein than 

 does old-process meal. Old-process meal is poorer in carbohy- 

 drates but considerably richer in oil than new-process. 



At the Iowa Station, i Wilson and E«ed, testing the relative 

 merits of the two meals with fattening cattle, found that new-pro- 

 cess gave equally as good returns as old-process meal when fed 

 in connection with other fodders. 



205. Value of oil in oii cake. — Eussian flax-seed oil cake carries 

 more oil than does American. To decide the merits of oil cake con- 

 taining much or little oil, tests were conducted in England by 

 Cooke' under direction of the Norfolk Chamber of Agriculture, 

 with Sir John B. Lawes and Dr. Voelcker as counselors. Sixty 

 sheep were divided into two lots of thirty each; to the first lot was 

 given cake containing six to seven per cent, oil, while the second 

 lot received cake containing from fifteen to sixteen per cent, oil. 

 The by-fodders were the same with both lots. 



Results of feeding linseed cake, low in oil and rich in oU, to sheep — 

 CooJce, Norfolk, England. 



High-oil cake. 



Number of sheep 



Length of experiment, weeks 



Feed consumed per week. 



Linseed cake, pounds 



Clover hay ohaflf, pounds 



Swedes (turnips), pounds 



Gain in weiglit. 

 Per head during experiment, pounds 

 Increase per head, per week, pounds 



I Bui. 33. 



» Jour. Eoy. Agr. Soc, 1889. 



30 

 16 



4.8 



4.8 



88.0 



38.3 

 2.4 



