Beans and Peas, Sfc. 



493 



4. That there is no reason to believe that linseed-cake is 



adulterated at any time with sand or other earthy matter 

 — adulteration by other matters being 1 also rendered 

 unlikely, by the next fact, namely, 



5. That different samples of seed, free from admixture of 



other seeds, or from impurity of any kind, present vari- 

 ations in the proportion of albuminous matter amply 

 sufficient to account for those found in specimens of 

 cake. 



But whether the differences in chemical composition of the 

 cake are such as to account for observed differences in feeding- 

 properties, it is left with the reader to decide. 



Of the relative price of different samples of cake I have 

 nothing to say. Under the most favourable circumstances for 

 comparison, it would be difficult to fix upon any starting-point, 

 where the price is so fluctuating. Some of the samples described 

 were sold at 91. 10s., others as low as 6Z. per ton. The only 

 general relation at all perceptible between price and composition 

 is in the fact before mentioned, that the English-pressed cakes, 

 which are richest in oil, also bear a very generally high price in 

 the market. That this is no rule, however, the higher price of 

 French than American cake, coupled with a smaller per-centage 

 of oil, sufficiently proves. 



Rape-Cake. 



Two analyses of this cake, and one of rape-seed, are given 

 below. Of their history I am unable to speak. 



Analyses of Rape-Cake : — 





NITROGEN. 











1st 

 Analysis. 



2nd 

 Analysis. 



Mean. 



Oil. 



Water. 



Ash. 



No. 1. . . . 



No. 2. . . . 



5*29 

 5-62 



5-17 

 5-54 



5-23 

 5-58 



11:63 

 10-62 



7-06 

 6-62 



5-70 

 10-41 



All that can be said from the above analyses of the compo- 

 sition of rape-cake is, that it is very much the same with that of 

 linseed-cake. Till lately, however, the hot flavour of rape-cake 

 lias been an insurmountable objection to it as a substitute for the 

 more costly article.* 



Rape-cake has been more often employed as manure. The 

 following analyses of its ash, made for me by Mr. Eggar, will 

 not therefore be without interest : — 



* See Mr. Pusey's notice on this subject in the July Journal, 1849. 



