96 
m goon of naturalists of the present day cannot very well doubt ; 
indeed, ome have aetually been observed in ordinary culture, and are 
would be much betterment in cane by watching for such variations. 
My own work, no further than it has gone, has led m me much against my 
will to fear that the chance for continued improvement from single stalk 
selection is not as great as could be desired. I do not find nearly the 
variation in the plats which have already been subjected to one selection 
that I did in my original selection from the field. Where the first year 
the difference in per cent. solids of the two plats planted was 2:2, 
the selections gave but slight individual variations in either plat, and 
there were in each case practically the same number of canes examined. 
All the canes from the high sucrose plats were correspondingly high 
and those from the poor plat correspondingly poor. "There was not in 
the rich Del a single stalk that I could think was distinctively richer 
than its associates from a any q quality i in itself; in fact, there were none 
at all that vé markedly superior canes to those adjoining them. o 
not think the same venetus vtm be held as good in regard to the 
cane froin poor sucrose seed, as some single cane might be unusually 
low in sugar from an silenti vds such as becoming wounded during 
cultivation, 
* [t is my "belief, then, that with a given amount of plants the 
cU gh nr in sugar can e bys seed selection will be more stable than 
sorghum or beets, and will, on the whole, approach its maximum 
satis rh but that the limitations to its ultimate improvement are 
-greater in either of these. Nature, however, may aid it in the 
fact de the ptedaition of sugar is a function ineident to the plant, 
while with beets and sorghum "this is an educated uality. Time only 
can tell which of these three will ultimately etie | in the world's sugar 
production, but whatever the outcome will be it is certain cane can 
take a great stride in the race, now that it has been found that seed 
selection will aid it 
CCCLXVI.—GUZERAT RAPE. 
(Brassica campestris var. glauca.) 
The seeds of rape yield on expression the oil familiarly known 
under the name of Colza. The residue or “cake,” which contains all 
the nitrogenous constituents of the seed, is largely employed in this 
country as a valuable cattle-food. 
Botanically the plant grown in Europe for the purpose is principally 
Brassica it: nie A var. Napus. In India the similar plant is B. 
dde nbs var. glauc 
ever, Mustard oil produces in the stomachs of cattle an inflammation 
which is often fatal. It is essential, therefore, that * Rape-cake ” which 
aa used for feeding should be free from any seed containing Mustard 
"Unfortunately Indian cu -— some of the characters of mustard. 
It appears to be largely imported into Europe for the purpose of oil- 
expression; but ra xe Man peri saleable as a manure, cannot be 
safely used as a cattle-food. 
