The sun. [volume] (New York [N.Y.]) 1833-1916, 1892-06-26
dino plate 1tforms light yellow. thin Aim

zinc plate It forms a light yellow. thin flm
OF comparatively high sensitivoncss to light,
and gives. therefore. beneath q negative OF
Utter the development with turpentine.
Cobalt ia now obtained from low grade ores
by roasting the ore in combination with COM
mon salt and manganese. and then treating
tho solution with sui phurctted hydrogen to re-
move tho copper. while tho cobalt IA precip-
itnt0d by suiphide OF sodium. Tho process
can be operated at much lower cost than by
In England where pitch or other bituminous
material is expensive. bri1uettcs for fuel arc
formed by tho use OF Glutinous or farinnccous
matters. such a. arc obtained from wheat,
barley. rye. or other cereals or Vegetables
these being combined with % 80 per cent.
Of coal ust qs n suitable proportion. Tho
mixture kn"alcd sets in Il short time. so that
moulding nndpr pressure Is unnecessary, al
though thr use Of mouis may be. rrsortci to
for nsurn2 rapid manufacture. 1t is suid. In
favor of this method. that tho product burns
with less smoke than the ordinary briquettcs
and il moro economical In usr.
Tho carat is not flxei weight and does not
mean the same quantity in all parts " tho
world. Thcre nre between ilftcen and twenty
different weights. ranging from 1SS mili-
grams, tho standard OF Bologna. to .2O1j. tho
Persian standard. Dutch weight is .2O5l.
English. 2OjI: French. .205. OF four princ-
pal bnlanco makers in tho United States no
two were found to have the same standard.
the weights varying from .2G5l to .2oS The
advantages Of Weighing and calculating the
value of diamonds and precious stones by the
decimal system instead Of by fractions of u
carat were suggested to the trade three years
ago by u New York Jcwcl!cr. Mr. NJ ID. Koths.
child. some dealers tried the system. and
thos" who changed methods regard tnr decimal
system as henr icial for rvrryi oily. from Tie
imlortrr to tho CONSUMER. Mr.. ,ho,hschild
four,hs to hundrrlhs. IT u customer on.
jected he charged the goods. in derimals md
|" the rad n, h las rsnrS IN tine n @
curary Of calculation. His suggestion Is that
tho diamond weights from one carat TO iDV
instead '' .: sxSfc" M Il tho " hnf and
Is"aSse they i are eSaai to o "fii" and 5ISG
The propositinn Is that thr rasnt hn diyid nt
lnt t these 20 100 lo Wsie Gi d lpio noe
cara,s would be equal t. 2o.'jl carats, Under
lars and the hundred his for cents, and null
tipicati"n is quick and accurate Tho weights
oil stones can re nsccriained more quickly. tho
stock accounts can DO kept in two columns,
end the totals added like dollars and cents
A German has ratenteda process for max
ing barrels without slaves. The trunk OF a trce
is sawed into lengths to the size OF the barrel
required. and the chunks are placed in a boiler
AMI boilel for few hours. 1t Is believed that
ifa current OF electricity be passed through
the boiler u chemical action is generated that
sostcns tho wool for working. Alter the boil
ing the bark is stripped from the chunks. In
front OF Il cuttint. tool the chunks are held by
folks in n manner similar to that in which u
piece of wood is held in Lathe Tn. chunk
rerolve! rapidly against the edge Of u iiTcd
broad blade that cuts a continuous shoot If
soft Wool 81 any desired thickness. Tn" strip
passes to fat table where il l. cut tran svcrsc
" into lengths OF tho required size. ono ma
and anoihcr cut, E-shapcd s'"ts out .! thu
edges. Then the piece. are l,"nt into e, lind'rs
ana hoorad. Moisture is extracted by Il Drying
apparatus.