Scientific American Supplement, No. 795, March 28, 1891Various
History
Scientific American Supplement, No. 795, March 28, 1891
Various
Science -- Periodicals
GAIN IN LIVE WEIGHT--CHICKENS.
____________________________________________________________________
| |
| Lot I. | Lot II.
| Nitrogenous. | Carbonaceous.
|______________|________________
| |
Live weight, July 26. | 8.94 | 9.06
" " November 27. | 17.89 | 12.63
Gain, lb. | 8.95 | 3.57
" per cent. | 100.11 | 39.40
____________________________________|______________|________________
Samples of the eggs from each lot of fowls were privately marked and
sold to a boarding house where the cook did not know that the eggs
were undergoing a test. On meeting the cook several days later the
following words were heard: "Do you expect me to cook such eggs as
these! About every other one is spoiled." On examination of the
ovaries after slaughtering, it was found that in the case of one of
the carbonaceous fed hens the ovules were in a more advanced stage,
but on the whole the nitrogenous fed hens were much nearer the laying
period. With this single exception, the clusters of ovules in the
carbonaceous fed hens were uniformly small. Neither group would have
laid under any probability for several weeks. It would seem from these
facts, together with the fact that during the experiment the
nitrogenous fed hens laid more than three times as many eggs, that a
nitrogenous ration stimulates egg production.
THE RESULTS OF SLAUGHTERING.
On November 27 the fowls were slaughtered. Each fowl was weighed,
wrapped in a bag to prevent floundering, and killed by severing an
artery in the roof of the mouth. The blood was caught in a glass jar.
The fowls were then picked and the feathers weighed, after which the
body was laid open longitudinally by cutting alongside the sternum and
through the back bone. When all had been thus prepared, they were hung
up in groups to be photographed, but the photographs were quite
unsatisfactory so far as showing the relative proportions of fat and
lean. The accompanying drawing made from the photograph shows the
relative development of an average pair of chickens. Attention is
particularly called to the thighs.
[Illustration]
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