New-York tribune., 1877-11-10


coptrvances more efficient be Is at least likely keep
even with the foremost Among the recent inventions
OF this sort which flyorably spoken or s Euro
pean which operates ty The expansion OF asnNrl- anN
wire that moves train ar whCcl-w0rk, 80 as 10 rsuhte
te ei of The carbnns In the Brush electric llght re-
Gently shown before the Franklin Institute, ot fhdntl-
g9n,sb g @ teir rate of mining and enable them be
made more slender their -uation rs to height Dr3g
effected by peculiar conn nsathS ihcnh,g , hn
Brush ma electric machine was also eAhlDte" pe
fore tile Institute
An extensive and elaborate series of tests
has been made by Professor r. H. Ihursioh to determine
the comparative strength OF coldpunched ana NOT
pressed iron nuts. Every precautOn was taken 10 h-
sure fairness IN the comparison. In respect to haDly
to stripping the thread for instance one mt OF each khd
was screwed each end OF the same rod, ana the nuts
verc pn uIIcd auart tin the thread Of gave way.
With only a single exception IN $50, the hotprcsFd NUTS
gave was first IL was noticed that the,e c.ici hoet
les-ly: when the rod was Afterwards puH,l ON vi
the Cold-puuchcd nuts, stripping their thread thry usu
ally broae ~ pieces with loud report. FROM tli' anH
other tests u decided that the coldp4hchel nui7
possessed much greater average schg. Lhth Nv @
pressed nuts The iattcrncycr Ieachcd me hilesl S
ard of strength of tie fCrmer, but sometimes supas'u
tlc minimum Of the cold-puHcLcd specimens "'''"a
there WIS considerable variety aud Woe r4ls' r,p m
makers OF eod-gunched nuts are oil course deu""''"
Mr. Edison. the inventor of many improve
ments In telcery is hard at work n the cndca'or to
make the telephone record the sound7 it transms His
apparlt 40 present consists chiefly of steel point at
fached to the disk Of telephone. and pressing 4hly
q strip of paper passed bcncath the point at Gno
rate The vibrations OF the disk are thuS fetoiu % an
can be translated. Mr.. Edison hls already argCyrd
some success Ia ths attempt hut as N,t mus olu'uy
with the more delicate vibrations. Tue lh'cul'oi Su- ~
gcsts ultimate possibility OF reporting sp.eeh ~
distance, verbatim, without the neod Of shorthand.
The Detroit Scientific Association, which is
one Of the best Of s kud is making am effort TO popu
Iarize It's weekly meetings by having some subject o
general interest presented every Wednesday evening
The effort mcos with good success. TIE wide range OF
these subjects may be Judged from toe titles Of three
Dreams" Coins" a winter i'm Jamaicl.' On the
las named tonic Mr. Henry Hubbard recently discourSrd
IL has made curious observations dulng hs tiy
in Jam.ca Tht shores Of the island abound with s,
hif ie seems to be Iitte l0ue I'm catching them. in-
stead Of securing supply from their own waters me
peoue depend ron importing salt hrrnes, goldfish ana
canned loscf3 from abroad. Natives that cannot AFFORD
these imported Injuries, are sad 10 I'VE Hiph hh "'3
ting bu. fre.h,' with very Injurious consequences to
fbrir health The negroes described as Inferior ll
activity and scfcanc- 10 those Of TINS country aLd'
Oh the whole. MT uA1drd Inclined TO douD' te pe1e-
nj of emancipation Ia Jamaica.
4 process for making glass iridiscent has
been patented by u. CitUaadot Be1uiliGl elects are
produced The main feature OF the process is the
application NJ acids to the glass, under pres
sure Of from two 10 five or more atmosphcrcs water
containing - per cent Of hydr5Ch"rc ac II us'd To
bring ont rainbow inis ibe moihet.oi iItafIi anu aIt-
fetal gems Of various SORTS has, thu' Dech t uitu
Tno glass prepared by tines processes qile 7 fioscc
il, antigua. iluCu Fli"i ihc pi-'tir
and the acids Mastering result tuat .ne or..Inu5 5
agencies tie atmospheric would take centuries 10 pro-
duoe
At 4 recent meeting of the st. Louis Acade-
my o Sciences Professor Riley gave come account OK the
American blster beetle. 1t appears tlal although
near relative of this insect the canihars or Spanish h
has long been used pharmacy, little IL yet known of
,ts tobf, in carly life Thc Same mystery has hung
the American blistcrcr In years these insects ap
pear iu sufficient numbers 10 prove 'cry destructive GO
Professor Riley has discovered that IN the larFa state
these insects prey upon the eggs of the Rocky Mountain
locust and De raised several specimens upon such
food aud observed their changes. IN rs first shape atr
hachng, the insect is adaurd - life above grouud,
their honey ami Tins j. also true Of II in IFS second trans
formation ~ H. thd shape ~ AZ armed |h powerful
maudiblrs aud claws; It loves darkness better than
hight ana takes naturally &" an underground existence
Technical details given of the hsectz anatomy IN
the three different forms.
A Liverpool correspondent of The English
Hecbanic describes engine ia which guEp0wder Was
to give the cu,e power There Vas cylinder, etc,
like the corresponding parts Of hyh-pressnre steam
enciuc Outside the cylinder brass wire, heated
5, a lamp Tie supply OF gunpowder was in hopper,
from which ping tap. revolving with the hyWheei car
rird small quantity OF gmpJwdcr, and Ht a certain
pglut I'm the movement dropped the portion Of powder on
the rel-hot wire. The WORKING Of the engine * thus
epiionil,d: "IHe theory bcautiiul but upon the
first trial unfortunately the whole affair went OF 50
completely very nearly taking fathers head along WITH
il that nc let il went, anc did not make any more
The radi0meter has started on its career with
the designation Of a scientific toy" but Tie Natu-
taot,rer aud Bui{der points cut nat there is ied OF
usefulness for ths instrument 1t can be used tn
Illustrate law Of the intensity OF light in class lectures
a. the number of ts rotations will be iuyersey the
sauarc ~ iis distance from Illuminating dame sni-
larry bc plDyed as phOtOmetcr also Il ght
prove Of service iu taking photographs after observing
how. many revolutions made Dy the YaneS while q
satisfactory picture j. taken. The iast suggestion is OF
great mr.it, present the rt Of photography IL
reduced "a respect TO the length az
exposure required i faint or fl light. obviously, II the
rndonrtcr faithfully measures the Intensity of the hr
gwen numoer its revolutions ghOud always corfes
pond TO = given Photographic impression.
The Germans have been experimenting to
ascertain and tear Of spoons These have been
suhectcd 10 constant aud washing FOR year and
tltr results tabulaed The aluminium spoons lost their
whitnness and became Of bluish gray; German silver
acquired obnoxious tlnt Of yciiowlsh gray genuine
SILVER alone kept it, color. Al the rate OF destruction
with the steady usage il found that 2is years would
he required ont silver spoon cOinpirtelyi
aluminium would iaSt - years German silver nearly
100. These results regarded as favorable TO the
substitution Of aluminium lOr silver IN spoons. HOW
would II serve Tor currency
RELIGIOUS INTELLIG ENCE.
From India the Rev. \. SheShadCi writes.
,,,auv az native ('lretiau. uuder