Does the analogy between the two
substances extend to the vibrating periods of their atoms? If it does,
then the bisulphide, like the carbonic acid, will abandon its usually
transparent character, and play the part of an opaque body when
presented to the radiation from the carbonic oxide flame. This proved
to be the case. Of the radiation from hydrogen, a thin layer of
bisulphide transmits 90 per cent., absorbing only 10. For the
radiation from carbonic acid, the same layer of bisulphide transmits
only 25 per cent., 75 per cent. being absorbed. For this source of
rays, indeed, the bisulphide transcends, as an absorbent, many
substances which, for all other sources, far transcend _it_.
* * * * *
THE HAIR, ITS USE AND ITS CARE.[1]
[Footnote 1: Abstract of a paper read before the Pennsylvania State
Medical Society, at Norristown, May 10, 1883.--_N.Y. Med. Jour._]
By JOHN V. SHOEMAKER, A.M., M.D., Physician to the Philadelphia
Hospital for Skin Diseases.
The object of this paper is to briefly describe the hair and its
important functions, and to suggest the proper manner of preserving it
in a healthy state.
I know full well that much has been written upon this useful part of
the human economy, but the constant increase of bald heads and
beardless faces, notwithstanding all our modern advancement in the
application of remedies to the cure of disease, prompts me to point
out to you the many ways of retaining, without medication, the hair,
which is a defense, ornamentation, and adornment to the human body.
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