Lastly,
they are of interest to the agriculturist, for they point out, I
believe for the first time, the exact amount of loss which grass--or
at least one sample--has undergone in conversion into silage, and also
that much of the nitrogenous matter is changed, and so far as we know
at present, lost its nutritive value. This, however, is only comparing
silage with grass. What is wanted is to compare silage with hay--both
made out of the same grass. Then, and then only, will it be possible
to sum up the relative advantages or disadvantages of the two methods
of preserving grass as food for cattle.--_Chem. News_.
* * * * *
THE ILLUMINATING POWER OF ETHYLENE.
Dr. Percy Frankland has obtained results which may be thus briefly
summarized: (1.) That pure ethylene, when burnt at the rate of 5 cubic
feet per hour from a Referee's Argand burner, emits a light of 68.5
standard candles. (2.) That the illuminating power of equal volumes of
mixtures of ethylene with either hydrogen carbonic oxide or
marsh-gas is less than that of pure ethylene. (3.) That when the
proportion of ethylene in such mixtures is above 63 per cent. the
illuminating power of the mixture is but slightly affected by the
nature of the diluent. When, on the other hand, the proportion of
ethylene in such mixtures is low, the illuminating power of the
mixture is considerably the highest when marsh-gas is the diluent, and
the lowest when the ethylene is mixed with carbonic oxide.
Pages:
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170