428 Keejniuf Qualities of Oil-cakes 



conditions favouring the development of moulds on oil-cakes, and the 

 consequent loss of organic matter. 



Conclusions. 



1. So far as keeping properties are concerned, palm kernel cake 

 compares favourably with most of the oil-cakes commonly used on 

 the farm. 



2. The only change which occurs during storage under ordinary 

 farm conditions is one which is common to all the oil-cakes examined, 

 viz. an increase in the free fatty acid content of the oil. 



3. During incubation at 37°, in a moist state, on only four of the 

 cakes examined, namely cottonseed, ground-nut, "soycot" and soya 

 cakes, was there any marked development of moulds. 



4. This development of moulds is always accompanied by loss of 

 organic matter, the loss being distributed between the oil and the 

 soluble carbohydrates of the cake. 



5. Moulds did not develop, during incubation, on cakes from which 

 the oil had been previously extracted. 



6. To prevent moulding of cakes and the consequent loss of organic 

 matter, dry storage is essential. Where cakes are stored under very 

 damp conditions serious reduction in their oil-content may take place. 



In conclusion I have to thank Professor Crowther for his helpful 

 advice during the progress of the work, and I wish also to thank the 

 Olympia Oil Co., Ltd., Selby; the various branches of the British Oil 

 and Cake Mills, Ltd. ; and Messrs John Curtis and Co., Ltd., Bristol, 

 for kindlv supplying me with the various cakes, used in this enquiry. 



LITERATURE. 



(1) Bremer, W. ('hem. Cenlralblalt, 1903, 1, 890. 



(2) Calder, R. B., Journ. of Agric. Sc, 1910, 7, 470—472. 



(3) Journ. of Board Agric, 1915, 21, 1029. 



(4) Journ. of Board Agric, 191.5, 22, 308—313. 



(5) KONIG, J., Fiihlings Landw. Zeit., 1902, 77. 



(6) Mackenzie, K. J. J. and Powell, E. H., Journ. of Board Agric, 1916, 23 



117—12.3. 



(7) MuNK, J., Arch.f. Anat. u. Physiol, 1879, 371. 



Virch. Arch., 80, 10. 



Naturforscher, 1883, 25, 239. 



(8) Murray, J. Alan, Journ. of Board Agric, 1914, 21, 700. 



(9) VoELCKER, J. A., Journ. R. Agric Soc, 1914, 75, 271 ; 1915, 76, 302. 



{Received February 22nd, 1917, 



