The workingman's advocate. [volume] (Chicago [Ill.]) 1864-1877, 1868-05-23


| A new gun has been invented bv M II.
coste, q respectable French shoemaker. n
will fire twenty balls in ten seconds. W.
hope Mr.. Lacoste has reflected that his cur
will take OF such number OF legs that II
will seriously damage the shoemaking bust
ness.
IxPkovExExr IN MAKrsc Glass The
changes oil various kinds, which glass under
goes have recently been subjects of consi
deraoie discussion. Some varieties Of glass
cannot be perfectly cleaned, owing to its hy.
groscopic nature and the tendency of this 81
iicious compound to decomposition. The
pure white uaalterable Bohemian glass Is q
silicate or lime and potash, but it 10 very in
fusible and difhcult to work Taking advap.
tage OF the weil-known fact that mixture
OF the carbopates Of potash and soda fuses
az q lover temperature than either salt alone.
Prof.. Stas substitutes such . mixture. for
the potash, and thereby obtains a glass a
unaiteraole as the Bohemian variety, bat
IN UGH more fusible.
CoLoRED ISks.-Fuchs' method of MAKING
colored inks is to digest for three hour =
quarter Of m ounce Of aniine. Of the color
desired, With two ounces and half Of Alec.
hol; then to ada pint and-a- half Of water
and heat the whole gently until all the alec.
hol Is driven Oh, after which one ounce az
gum arfbic dissolved in eight ounces II 80
ter is added. The solution ia allowed n
stand until the impurities have settled. and
II then ready for use.
VALUABLE CEhENr.-Dr. Tollens mixes
equal weights OF oxyd Of zinc Commercial
Hinc whiIel and very line sand, TO which 10
auoeo = solution OF chloride Of zinc, having
q density OF l.26. The paste thus formed
eets rapidly and resists the action or most
ACIDS American dentists have EMPLOYED
Tor many years the same paste, substituting
powdered quartz for sand. This paste. how.
ever, does not resist the action Of the saliva
Of the mouth for any great length OF time.
CURk RoR rHE CATrLE PLAGUE--Chlo,i de
OF copper 10 now extensively used in Germa-
~ against the cattle plague. The practice
- 20 dissolve eight grammes Of crystalsxed
cuiorioe or copper in two kilogrammes OF al
conol, and with this solution to wet pad Of
cotton, which 10 then laid on plate and
burned in the center Of stable. the heads
o. the animals being turned toward the plate
so rs TO breathe the fumes. This operation
Il performed morning and evening one pad
IS burned for every three head If cattle.
The solution is also administered internally.
with the addition of fifteen grammes Of chic.
reform for the above named qsantity. A
teaspoonful Of this liquid Ia mixed with each
animals drink.
NEw ALLOYS on LEAD AHD Tm.-M. PHO
describes iva new alloys containing less Ii n
than ordinary pewter, which are NOS acted |
upon BY boiling accetic acid or by salt wa |
Ter, and may therefore Be used for some |
kinds OF Utensils The first alloy contains
one part Of tin and "a parts Of Lad. II has
density of 9.64 and mslts d $40 Fab
renheit. IL IL made BY frss melting the iesd |
md, after skimming il, gradually adding the
an bY stirring Il constantly with wooden
tick in the meantime, the lead 10 prevented
rom settling to the bottem. 7hs second al.
oy consists Of one part Of tin with las Of
cad. II . lsas malleahle md more brittle
han the irst.