The Popular Science Monthly, July, 1900: Vol. 57, May, 1900 to October, 1900Various
Science
The Popular Science Monthly, July, 1900: Vol. 57, May, 1900 to October, 1900
Various
Science -- Periodicals; Technology -- Periodicals
The important result was that the corona gave a positive indication of
heat as compared with the moon.
This heat, though certain, was, however, too slight to be sub-divided
by the dispersion of the prism with the means at hand.
The negatives taken to depict the outer corona show from three
to four solar diameters extension for the longest streamers. The
equatorial ‘wings,’ as they recede from the sun, are finally lost in an
illuminated sky, without any indication of having actually come to an
end.
No attempt to carefully examine the plates taken for intra-mercurial
planets has yet been possible. It is, however, as has been remarked,
doubtful if the very faintest objects will be found, in consideration
of the considerable sky illumination during totality. However, Pleione
in the Pleiades (a star of the 6.3 magnitude), is plainly seen on one
of the plates, and some smaller ones are discernible.
On the whole, the expedition may be considered as promising to be very
satisfactory in its results, and that it was so is largely owing not
only to the efficient care of Mr. Abbot, but to the many gentlemen who
have assisted me with the loan of valuable apparatus, with counsel,
with voluntary service and with painstaking observation, to one and all
of whom I desire to express my obligations.
MALARIA AND THE MALARIAL PARASITE.[E]
BY PATRICK MANSON, M. D., LL. D.,
LECTURER ON TROPICAL DISEASES AT ST. GEORGE’S HOSPITAL AND
CHARING-CROSS HOSPITAL MEDICAL SCHOOLS AND AT THE LONDON SCHOOL OF
TROPICAL MEDICINE.
[E] Abstract of a lecture delivered at the Medical Graduates’
College and Polyclinic, and printed in the _Lancet_ of May 19.
This lecture is devoted to a description of the parasite and of its
life cycles. The existence of a parasite in malarial disease has been
suspected for a long time, but only very recently have we had absolute
assurance that such a parasite exists. Some time in the thirties Meckel
described in the human blood certain black particles which he found
in leucocytes and in certain pale, leucocyte-like bodies the nature
of which he did not know. When he saw these bodies he certainly saw
the malarial parasite. His observations were repeated and extended in
the forties and the fifties by Frerichs and Virchow, and they, too,
undoubtedly saw the malarial parasite. But it is one thing to see and
quite another to recognize; discovery is recognition.
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