Burlington weekly free press. [volume] (Burlington, Vt.) 1866-1928, 1911-11-23


hut ingenious way. If vibrations are
shaken out along a rope one can see the
rope arranging itself in wave forms
These wavs forms are not OF the length
from crest to crest of the vibrations sent
along the rope; they indicate the positions
of least movement--the nodes, as they are
called.
Campbell and Dye sent the sound waves
from their electric spark along tube In
which excessively fine dust was strewn.
The travelling waves arranged the dust in
little heaps at regular intervals. thus
marking the nodes and enabling the
wave-lcngth to be ascertained The IN
vcstgators were thus able to measure
sounds of a frequency up to eight hundred
| thousand second. Their principal result
appeared to show that two sound waves
were given out for each electric oscilla-
! ton, and that the sound waves were
double the frequency of the electric os-
! citations.
\ valuable investigation on the suscep-
! tibilty to tuberculosis at varying ages
has been set on foot in Paris by Doc
| tors tamette, Grysez. and Letulle' IN
/ the larger number Of cases the tubercIe
] bacillus Is acquired in childhood or In IN
! fancy. as is shown by the greater IRE
| qucncY of positive reactions to the tuber-
line test among children between the
ages of one and fifteen. In the Presse
| MediCae the results of tests applied 10
! 1.226 subjects picked at random from all
classes are tabulated. Among 273 infants
of less than one wear whose blood rea Cted
| to the tuberculin test one only was less
than two months old the other twenty
four were between the ages of six months
and one year More than ninety per cent
| NJ the infants examined showed no trace
! OF tuberculosis. In the first year or n
childs life. while 1t lives relatively iso-
lated and protected from the contact OF
bacili, 1t very often escapes contagloi
altogether Contagion begins TO take
place when it goes out of doors especially
when 1t begins 10 walk. when its food Is
modified. and when its life and habit!
are brought more into relation with tht
| surroundings in which it lives. At five
years of age more than fifty per cent
of children are already contaminated witt
the bacillus of tubercle. At fifteen years
the proportion mounts to eightN-One pei
cent, and II oscllates about the regior
of ninety per cent. till maturity is reach
ed AT the age of twenty the people whC
have escaped Contagion altogether ar
relatively rare. But Notwithstanding the
immense number of people who are &C
tually infected with the bacillus only
twenty-four per hundred are really tuber
culous and become subsequently a pre-!
to one of the diverse manifestations o
tuberculosis. Among the majority tbs
infection remains latent or hidden, anc
: I, hot, (Ful
mette. in summarizing these researches
calls attention to the necessity Of distn
, gushing between the actual infection h,
the bacillus u'infect!on bacillaire), which
is of extremely frequent occurrence an,
may be unaccompanied by any morbi'
symptoms, and tuberculosis which ha
? characteristic LESSONS.
At the Congress OF Hygiene, held /,
Paris, discussion took place on tn
question of the micro-organisms whicI
might find place in bread. NJ Rouse
brought forward some experiments whcI
showed that pathogenic spores coul
maintain their existence in dough. Fl
was followed by DR. Balland. who point
ed out that the temperature at wnic
bread was baked was sufficient to de
stroy all microbes even If it were no
able to kill all the spores. DR.. Suche, o
: Bordeaux. ridiculed both suggestions, an
endeavored to show experimentally tina
infection by or from the insides Of loave
or baked rolls was improbable to Tn
point of impossibillty NJ. Jorisenne @
Liege partisan of neither view, drew at
tention 70 the fact that bread could a.
, ways be steriiZed by the simple exped
ent Of spreading 1t with d thin layer c