New-York tribune., 1875-03-08

emy of Science at Vienna, Prof NIesener stated
shat Schumacher had found that alcohol-yeast
which had been subjected to the lowest temperature
he could produce namely, Ia }, by mixture or
solid carbonic acid aud ether in vacuum. vegeta-
ted again when placed III solution ot sugar.
NEW SPEAKISG AND HEARING TRUMPET FOR
DrvERs.-An apparatus, patented by Bremen & Co.
of Kel aud introduced for trial into the German
Imperial navy. not only enables the diver to COM
nunicate with those at the air-pump but also to
hear distinctly. to a depth of 16 fatboms, every
word spoken at The surface The absolute safety of
tEe diver being thus secured, 1t is expected they
will be able to work for smaller wages thus render
ing their services available In many cases in which
they would otherwise be too costly. 1t is said that
the invention is very simple. and can be attached,
without much expense, to any diving apparatus:
The main principle involved is the application of
vibrating metallic plates for the propagation of the
sound without, however, allowing them to come
In contact with the water.
PRESERVATION OF COOKED MEAT.-Experiments
were made 10y Broxner for the preservation of
cooked meat. by cooking III ounces of beef for two
hours by which operation il lost threefths of It's
weight, and then squeezing it into a beaker. after
cutting it into two pieces that il was completely
surrounded by gravy made by browning well 8!
ounces Of -four with as much beef-talow sailing il
moderately. and then adding the juice obtained in
cooking the meat, mixed with solution of 90 grains
of gelatine in vinegar. In a few hours the whole
mass became hrH, aud the DeakeT-gass was loosely
covered with paper aud placed at the closed window
OF a low attic-roOrn. After 10 weeks il found
entirely unchanged in consistency color, odor or,
favor; and tasted prepared with the gravy. like
freshly cooked meat although the lowest tempera-'
ture Of the room during the whole period was 45io
and sOiled clothing fruit &C. had been kept in the
same room. He recommends the process for army
use.
HEAT AND VEGETATION.-In some remarks, ON the
relation between heat and vegetation which are
translated by Firket from the work of Kabsch on
che Vegetation Of the Earth the latter states that
the three fundamental laws of vegetation are as
follows: First, for each plant there exists maxi
mum and q minimum temperature, between which
this species is capable of normally exercising its VII
tai functons second, in the termination of grains
the opening of buds the maturing of fruit. each has
need of q certain average degree Of temperature
which NAV be very different according to the species
Of plant; third each species OF vegetable, IN order
~ 20 through the various phases OF its existence
needs certain total of heat, and 1t is only in
she localities where this total is furnished every
year and where the conditions OF humidity and the
constitution of the soil equally favorable, that
tbe existence OF the plant can be regarded as as-
eured Applying these principles 10 certain we'll
known plants ksbsch finds for the grapevine for
instance, that the limiting Temperatures between
SAasS w yaSs sDa 10 cultivated naturally aIs