30 
Pure and Mixed Linseed- Cakes. 
he reported to me had killed several of his cattle, and proved 
more or less injurious to the rest. On examination I recognized 
the cake at once as a siftings-cake containing scarcely any 
linseed. 
19. Poppy-Cake. — There are two kinds of poppy-cake — 
one a whitish-looking cake made from white poppy, and the 
other a brownish-coloured cake made from ordinary poppy- 
seed. 
When fresh, poppy-cake is a useful feeding-cake. Poppy-oil, 
however, rapidly turns rancid, especially under the influence of 
heat. Hot pressed poppy-cake for this reason frequently has a 
rancid taste. On keeping for any length of time, such cake 
becomes so rancid that cattle refuse to eat it. Having become 
unsaleable as a feeding-cake, it is exported into England from 
Belgium and other parts of the Continent where it is chiefly 
produced. It is ground fine, and together with other materials 
manufactured into linseed-cake. 
A sample of poppy-cake analysed by me yielded the following 
results : — 
Composition of Poppy-Calce. 
Moisture 11-63 
Oil 5-75 
• * Albiiminou.s compoimds (flusb-forming matters) .. 31 '40 
Non-nitrogenous substances 38 ■ 18 
t Mineral matter (ash) 12-98 
100-00 
* Containing nitrogen 
■j- Containing sand 7*58 
Poppy-cake is usually poor in oil, and as poppy is generally 
grown on light sandy soils, in harvesting the seed it frequently 
becomes contaminated v/ith fine white sand, which, as shown in 
the preceding analysis, thus finds its way into the cake. 
20. Curcas-Cahe. — Curcas beans are the oily seeds of a small 
tropical tree {Jatropha Curcas) which flourishes especially in 
_. ^ , the Cape de Verde Islands, 
Fig. 2^.-Cm-cas-bean. ^^^^ ^^^^^^ ^^^^-^^^ 
largest supply of this oleagin- 
ous seed. The beans are of 
t\f about the same size as acorns. 
Ifl ' , ■ ll\ WUm The white kernel is surrounded 
by a brown-coloured thick seed- 
shell, which has the distinctive 
f*;' > ^l^y structure represented in the 
-^'(<Mi:'\A'''^' accompanying wood-cut (Fig. 
23). 
