the lapse of the proper time, must
hold his breath as he enters the room to open the windows and let out the
gas. After fumigation, plastered walls should be white-washed, the
woodwork well scrubbed with carbolic soap, and painted portions repainted.

[56] Put copperas in a pail of water, in such quantity that some may
constantly remain undissolved at the bottom. This makes a saturated
solution. To every privy or water-closet, allow one pint of the solution
for every four persons when cholera is about. To keep privies from being
offensive, pour one pint into each seat, night and morning.

[57] "While physiology is one of the biological sciences, it should be
clearly recognized that it is not, like botany or zoology, a science of
observation and description; but rather, like physics or chemistry, a
science of experiment. While the amount of experimental instruction (not
involving vivisection or experiment otherwise unsuitable) that may with
propriety be given in the high school is neither small nor unimportant,
the limitations to such experimental teaching, both as to kind and as to
amount, are plainly indicated.

"The obvious limitations to experimental work in physiology in the high
school, already referred to, make it necessary for the student to acquire
much of the desired knowledge from the text-book only. Nevertheless, much
may be done by a thoughtful and ingenious teacher to make such knowledge
real, by the aid of suitable practical exercises and
demonstrations."--_Report of the Committee of Ten on Secondary School
Studies_.

[58] This ingenious and excellent experiment is taken from the _New York
School Journal_ for May, 1897, for which paper it was prepared by Charles
D. Nason, of Philadelphia.

End of Project Gutenberg's A Practical Physiology, by Albert F. Blaisdell

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