Appletons' Popular Science Monthly, January 1900: Vol. 56, November, 1899 to April, 1900Various
Science
Appletons' Popular Science Monthly, January 1900: Vol. 56, November, 1899 to April, 1900
Various
Science -- Periodicals; Technology -- Periodicals
* * * * *
By using the tuberculin test the faculty of the Ohio Agricultural
Experiment Station have learned that in cattle the tubercle bacillus
usually first obtains its foothold in some of the minor glands, that
it may exist there for months and years before any other organs are
affected, and that it is only in advanced cases that the lungs become
diseased. While the growth of the organism is limited to these minor
glands the health of the animal usually shows no sign of impairment.
During this period there is no evidence that any unwholesome effect
is being produced upon the flesh, and so long as the infection is
localized in this way in one or two organs the Government inspectors
pass the meat as sound. Tuberculosis, therefore, is a very different
complaint from such diseases as pleuropneumonia or Texas fever, in
which the whole system is saturated from the first instant with the
febrile symptoms.
NOTES.
Mr. James Weir tells of a spider which stretched its web in the
division between two parts of a sawmill, where the lower fastenings of
the structure were frequently broken by the repeated passing of lumber
through. Discovering the situation, the insect gave up the use of guy
threads, and, finding a nail, wove it into the lower edge of its web,
so that it should operate as a sinker to keep the web stretched.
* * * * *
N. G. Johnson, of the Maryland Agricultural Experiment Station, telling
the Society for the Promotion of Agricultural Science the story of
his fight with the pea louse, represented that the pea raisers in his
State had lost this year more than three million dollars by the ravages
of this insect. A parasite had been discovered which practically
annihilated the pest, but the discovery was not made in time to save
the crops in some parts of the State from destruction.
* * * * *
The American Society for the Promotion of Agricultural Science,
after hearing the account of the work of the Gypsy Moth Commission
of Massachusetts, which has spent more than a million and a half of
dollars in trying to exterminate the mischievous insect, approved the
action of the Massachusetts Legislature in maintaining the commission,
and requested that the work be kept up for a short time longer. This
was because it was represented that the moth was now confined to a
limited area, and could be easily exterminated by the expenditure of a
small amount more of money.
* * * * *
Public-domain text, read in full here on John Shaqi.
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