At the suggestion of Mr. J.L. Smith the test tube was made a part of the
apparatus by fitting it (by grinding) upon the conical end, and in its
present form it serves to protect the latter from dust and to prevent
evaporation of the urine (or other liquid), and consequent deposition of
salts, if, for any reason, the user should allow the tube to remain
suspended for several days.
These tubes will be found very useful for collecting and concentrating
into a small bulk the sediment contained in any liquid, whether it be
composed of urinary deposits, diatoms in process of being cleaned, or any
thing of like nature; and, as the parts are all of glass, the strongest
acids may be used, excepting, of course, hydrofluoric acid, without harm
to the tubes.--_American Microscopical Journal_.
* * * * *
[Continued from SUPPLEMENT, No. 594, page 9491.]
CLIMATE IN ITS RELATION TO HEALTH. By G.V. POORE, M.D.
[Footnote: Three lectures before the Society of Arts, London. From the
Journal of the Society.]
LECTURE III. DISEASES CAUSED BY FLOATING MATTER IN THE AIR.
The information which modern methods of research have given us with
regard to the floating matter in the air is of an importance which cannot
be overestimated.
That the air is full of organic particles capable of life and growth is
now a matter of absolute certainty.
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