The Delaware ledger. (Newark, Del.) 1879-19??, 1883-10-20
"A method Of coating the surface of

"A method of coating the surface of
wood so as to render it hard as stone
has come into vogue in Germany. The
composition is a mixture Of forty parts
of chalk, fifty of resin and four Of lin
seed oil, melted together, then adding |
one part of copper, and finally one Of |
sulphuric acid. 1t is applied hot with |
brush.
An excellent stain for giving light
colored wood the appearance of black
walnut may be made and applied as
follows Take Brunswick black, thin
it down with turpentine until it is about
the right tone and color, and then add
about one-twentieth its bulk of varnish.
This mixture, it is said, will dry hard
and take varnish we'll.
Blasting paper has been made by
J. Petry, of Vienna. 1t consists of
unsized or ordinary plotting paper coated
with hot mixture of seventeen parts
of yellow prussiate of potash, seventeen
of charcoal, thirty-five of refined salt
petre, seventy of potassium chlorate,
ten of wheat starch and. 1900 of
water. When it is dried it is cut in
to strips which are rolled into car
tTidges.
Professor Huxley maintains that
in fishing districts an acre of sea was
more profuse in food production than
an acre of land. Salmon rivers required
protection. But in the case of the great
sea circumstances were entirely differ
emit. He believed that the cod, herring,
pilchard, mackerel and similar fisheries
were inexhaustible, and were entirely
beyond the control of man either to
diminish the number of nsh or to in
crease them by cultivation.
in the English navy only lime juice
is used with the gratifying result that
scurvy is now practically unknown. In
the merchant marine service, however
, lemon juice is chiefly used, owing t.
;. its cheapness, and here cases of scury.
are frequently occurring, not Mr.. Con
roy thinks, that lemon juice is inferio
to lime juice as an anti.scorbutic bu
simply that it soon becomes inert an,
" useless by fermentation.
M. Pasteur is strongly inclined +
believe that the plague which ha
caused so many deaths in Egypt is pro
duced by some species of microzyme
IN AS yet he bases his opinion upon theory
m because no one has discovered the sur
n posed germ of the disease. The prot
3. ability is, however, that the theor
will be confirmed Def re very Ions
m Many very eminent men are and hay
be been devoting their attention for SON
of time TO this subject of cholera Origin
sh and good results may be expected.
u. DIR. Starke makes use of the follow
ing test to ascertain whether his patien
be have followed his directions when
of preseribes iodines. 1t might also
it made use of by physician to leal
re whether patient has taken iodin
ng again his wish. He lets the patiel
spit on piece of white paper, and the
90 spreads some calomel over it, OF
rio sprinkles calomel on any sores that u
NO patient may have. The calomel tur
de bright yellowif there is any iodine in Il
1lv system. Medical Record.
1t is reported that firm in Pa
The has patented an invention for the
; a Simultaneous formation of steam, SO til
I'M. it can be used at once in the cylind
tri- of the engine. A pumyr1, ~ - 'r~Vr
va quired guam. i.'.sI''e = . .--.'0 the T
Mo plate '+oo.;;,ty Of water between tV
@,I,Ia = surfaces, which are heated, al
y between which there is only capilla
III space. The liquid spreading into a th
on layer evaporates instantly without goil
W, into the so-called spheroidal state, al
' the steam acts in the cylinder as fires
10 formed steam. The speed of the pur
-; is regulated by the engine.
18th How digestion is affected by su
condiments as salt and vinegar
been carefully studied by M. @. II
Ter son, and the results presented in pa
Du1 read before the Academy of Scienc
our Paris. Taken in moderation tn
o"- condiments are useful. They prom
sue the formation Of the gastric juice.
MIX if they are INDUCED to excess {
any irritate the coats of the stomach |
rap render the food more indigestible.
proportion of salt should not
nut coed five to ten grains to 0.5 k
grammes of meat, and of acid one
lade four per 1000.
pro-