Evening capital. (Annapolis, Md.) 1884-1910, 1885-04-25
sCIENTIFIC ND TNDuSTRIII

Two French scientists have invo..;
gated, by means of the spectroscAna ~.
light emitted by the FREELY. Thev guy s.s
It TO consist Of red, yellow, green and !
little blue light.
In relation to the ventilatino Of b.d
rooms, Horace Mann used to saw tbs,
since the atmosphere was forty MIL,
deep oil around the globe. it was nso
less economy to breathe it more thsn
once. '
A Wisconsin lumberman has inyen,od
q sled with hollow shoes that will nal
ice roads. Steam and hot water .ro
forced through perforations in the shoe,
so that the snow may be softened packe5
and frozen into cutters that will hes,
the runners of the heavy logging sleds
The very remarkable statement is mad,
in the Medical Times that DIR. Fleiscbl
Of Vienna, has discovered that the bv
dr0chlorate of cocaine, administers
hypodermically in doses of from one
twelfth to one-fourth of grain. will curo
morphinism, alcoholism and simila,
habits within ten days.
A floor of paper has been made ina
new rink in Indianapolis Straw boards
are pasted and pressed together bv nv.
draulic press, and when seasoned thew
are sawed up into flooring, the edge n
the paper forming the floor, which i
without joints. When sand papered 4
becomes smooth as ice, aud is noiseless.
M. Fordoz gives in Cosmos a yerv
simple and useful method of detecting
lead in the thinning of culinary utensils
The vessel being carefully cleaned to re.
move grease, drop of nitric acid is an.
piled to any part, and gentle heat il
used to dry thesspos. A drop of solution
of iodide of potassium is applied to the
spot, and if lead be present yellow
iodide of lead is formed.
To send and to receive kilograms on
train moving at the rate of 30 miles an
hour, with the same facility as in any
telegraph Office, says Industrial america,
will be admitted to be noteworthy feat
but that it has been successfully accom-
plished admits of not possible doubt
As in most inventions of merit. the
means employed are quite simple, and
the invention acts upon principles that
have long been known and applied.
DR.. j. M. Andcrs has reached the con
clusi0n that only Towering plants, grown
in well-lighted places. generate ozone;
and that the most odorous flowers PRIV
duce the greatest quantity. The ozone
attacks the organic matter of the air, and
by oxidation renders it inert; and Dr.
Anders does not doubt that Towering
plants in clear weather give off enough
of this natural purifying agent to be of
hygienic value indoors Foliage plants
although yielding no ozone, may be of
advantage in contributing to the mainte.
nance of healthful degree of humidity
in the atmosphere of rooms.
Statistics collected by the American
Ornithologists' union show that great
numbers Of birds are destroyed by flying
against the lighthouses of Cuba. AT
Baredon Grande. more than 100 birds
were found one morning; in one night
last October 278 were killed by flying
against the lighthouse at Cardenas; and
Of the San Antonio lighthouse more than
600 are sometimes picked up after sin
gle nights destruction. Thus is con.
frmed the view expressed by Prof Spen-
Ger +. Baird, twenty years ago, that
every autumn a great bird wave sweeps
over from Florida to Cuba.