ert a greater quantity of raw material into the
manufactured article than the more matured pig, in proportion to the
amount of food required for the mere upkeep of the machinery.
Experiments which most clearly prove this have been duplicated in
Denmark, in the United States, etc. At Copenhagen nearly seventy
different experiments were carried out with pigs of varying weights,
with the result that pigs weighing about 275 lbs. live weight were found
to require nearly twice as much food to make an increase in their live
weight as did pigs weighing from 35 to 75 lbs. That this was not an
exceptional case is clearly proved by the fact that the increase in the
amount of food required to enable them to make an increase in their live
weight was gradual, and shown in every stage; thus pigs of from 35 to 75
lbs. consumed 376 lbs. of food for each 100 lbs. increase; pigs of 75 to
115 lbs., 435 lbs.; pigs of 115 to 155 lbs., 466 lbs.; pigs of 155 lbs.
to 195 lbs., 513 lbs.; pigs of 195 lbs. to 235 lbs., 540 lbs.; pigs of
235 lbs. to 275 lbs., 614 lbs.; and pigs of 275 lbs. to 315 lbs., 639
lbs.

Even if this series of experiments stood alone they surely would prove
most conclusively that the common belief in old and nearly fat pigs
giving the best return from the food consumed is founded on fiction, but
similar tests were made at many of the American Experiment Stations,
these tests together numbering some hundred. The results are given in
tabulated form in Henry's _Feeds and Feeding_, where the various points
are so clearly brought out that we have taken the liberty of lifting the
whole of the notes relating to "weight, gain, and feed consumed" by
pigs. "At many of our stations, records of weights and gains of pigs and
feed consumed by them have been so reported as to permit of studies
concerning the influence of increased size and weight of the animal on
the consumption of food.

"All of the available data from trials of this character conducted in
this country" (the United States) "up to the time of going to press,
enter into the composition of the table given below. In compiling this
table, six pounds of skim milk or twelve pounds of whey are calculated
as equal to one pound of grain, according to the Danish valuation of
these articles. For convenience of study, the data are presented for
each period covering fifty pounds of growth, the actual average weight
of the pigs, however, being given for each division:

DATA REL