New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1879-11-15
SCIENCE FOR THE PEOPLE.

THE New COPYING PRoCESs.-1he Sc'entPc
bm,y,can give. this bref simple description OF the new
gelatne process: Write with steel pen ON ordinary
writing paper; allow 10 dry; press the writing gen,S
upOn the tablet. allow II to remain minute "he 'i'
part of the ink will been transferred to the
gelanous surface and soon as the paper has zee"
removed the tablet ready to take impressions rom
Place ordinary writing paper upon the charged apie'
smoothing over with tire hand and Immediately remove
The sheet which viii be found to bear correct copy VI
the original writing; repeat with other sheets uh' 'o
transferred ink becomes exhausted Immediately after
wash the tablet with water and sponge "t u oiy anu
tits ready again for With tablet aud INK prepared
according 10 the following fty good copies from one
transfer have been obtained and doubtless with care II
would afford twice this number. The proportions i'i
the pad or tablet Gelatine. one ouncei gNeei"
t,x and oncquarter fluid ounces. Cooper geia'he an"
pure concentrated eiycerlne answer very we'll sum
the ge atine night IN cold water ana IN the '
ING rour on the water and add the sweled ged'ue !"
the clycerine heated To- about 2OOo fahrenhot over
saltwater bath the heating for sevefal hou'S
10 eSpel much Of the water as possible tnen pour
shallow pan or on ~ piece "l N"iN
board placed level table and having us euk. ~
ny about Que Sishih OF al hs al br. or more pro-
teclcd from Rub The surinc" sohke shknt
in The rrst transfer The ink i prepared hv dssoNing
one ounce OF anine violet or blue q To ~ IN sever
fuii ounces OF hot water aud. on cooling, addl QUO
ounce of VINE split with oueQuarer ounce of glyee-
Inc, few drops OF ether aud drop OF cSrooIe "eu
Solar ACTIvITY.-The long sun-spOt mini
mum has apparently passed away and various instances
oarenewaI OF solar aciivtyor at least OF the recur-
renee OF sunspOtshnd their TO the scenthc jour
nails Oae OF the most striking Of these groups was Oh
served on October Is 1t of enormous Size but APP
p,arcd u 10 burst forth suddenly IN It's fn grandeur,
but have broken through The suns surface gradually
IN other words. the soar eNloSlCh-H me group VI
spots were the ult OF an expOson-lasted more IMAM
tweny-iour Lours.
PRESERVING MuK-IIerr Maurice Philip,
~ Reisbach Zurich has apparently discovered plan OF
sceping milk good fresh any temperature FOR long
periods The details OF the plan are not yet announced
aud II impossible to say whether the process Is likely
g. he CONNIE About the scientific success
inerc seems TO be no doubt. Three months ago Mr.,
Paipp placed hands Of the Chemical Agricultural
Commission OF Zurich bottle containing sample OF his
preserved mR by whom has been submitted to the Sc
verest tests IL placed eight DAYS IN an ordinary
room. the temperature OF which during the day rose
sometimes high 75' Fahrenheit, without percept
bic effect on it, quality appearance II creamed
like any other milk, aud butter might have been made
from It had IL been thought desirable 20 do D. The
same favorable results obtained at various inter
walls throughout the three months question and the
most Of Dr. Crete. president and analyst Of
the Commission failed to detect in the mix any doubt
fnl ingredient such experimenters have occa
eionsly used FOR purposes OF milk preservation The
analysis gave the following results speclnc gravity
1O9-5 wafer. S65si sOnd matters. l342 per cent.
The a;Cr of caselne aud abumcu $50; fatty
substances 3.72 milk sugar. 476 ash GA, and sun
dr. organic matter. O.1O per cent
HARDENED GLASS. - Considerable progress
seems made OF late IN the manufacture Of
hardened or tough glass amt most Of the difficult es
connected with the new industry have been overcome
What important. the processes Of manufacture
have boon supplied aud combined with the ordinary
operations of elassOlowing as TO diminish the ex
pcnse and give regular forms aud more perfect
execution. Objects made with tie liquid material. when
they st red thrown directly into the tenpeling
bath aud are again heated TO the melting point, IA
AZ first which often causes change IN their form.
B1tlcs, drinking glasses lamp glasses and other con
objects containing air are received on curved
tube a sort Of siphon. which AT the moment OF INNER
sion allow. the escape. while the liquid enters tie
cavity without dlc ullN. All these Improvements have
been adopted 10 tnr glass works Of Cho9ycifn, under
NJ BastiCs direction, II Is confidently expected that
ST. short time objects m hardened glass VIII be
quite as cheap those uade IN the ordinary way.