PROCEEDINGS OF THE CHEMICAL DEPARTMENT. 



189 



Now bran contains 13"80 percent, of albuminous compounds 

 and 5'46 of oil, and if the adulterator chose to add it to the first 

 of these cakes in the proportion of one to three, he would get a 

 mixture containing 24 - 84 per cent, of albuminous compounds 

 and' 1074 of oil, so that the adulterated cake would actually 

 appear somewhat better than the genuine, though inferior cake, 

 provided the mere analytical numbers were examined ; and if 

 the bran were finely ground, and the cake well pressed, it would 

 look quite as well as the genuine article. If, now, the adulterator 

 chose to look about for some substance fitted to correct the effect 

 of bran in reducing the per centage of albuminous compounds, 

 he has no difficulty in finding a variety of materials to suit his 

 purpose. He might use decorticated earth nut cake, containing 

 44'0 per cent, of these substances ; poppy cake, with 34-00 ; 

 rape cake, with 30*00 ; and, by careful adjustment of the rela- 

 tive quantities of these seeds, he might obtain almost anything 

 he required. Thus a mixture of three parts of the cake No. 2, 

 one of bran and two of earth nut cake, would contain 28-84 of 

 albuminous compounds, so that a mixture containing only 

 half its weight of linseed, and that of inferior quality, would, if 

 the analysis only were looked at, appear rather better than 

 another sample composed entirely of the best linseed. 



As an illustration of this kind of adulteration, I give the 

 two following analyses of oil cakes, recently sent to the 

 Laboratory : — 



