(_Continued from No. 2._)
SEC. 26. The law requires that the inventor shall deliver a model of
his invention or improvement when the same admits of a model. The
model should he neatly made, and as small as a distinct representation
of the machine or improvement, and its characteristic properties, will
admit; the name of the inventor should be printed or engraved upon, or
fixed to it, in a durable manner. Models forwarded without a name,
cannot be entered on record, and therefore liable to be lost or
mislaid.
SEC. 27. When the invention is of 'a composition of matter,' the law
requires that the application be accompanied with specimens of
ingredients, and of the composition of matter, sufficient in quantity
for the purpose of experiment.