New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1876-07-29
~. uIlEEY NOTES.
Brrrcu-IoAprRs- CALCULATING E>Gl>E - STONE
s,w-IARGEsr AND SMALLEST ENGINES IN I'M

BELECHIoADrEs - CALcriNIi>G E>"'>E STONE
s,w-LAgGEsr A>D SMALLEST ENGINES IN mn
yorID-iyGErIOU, INytNI oNs.
ORION tn hLGuLAR CoGEEsroND.>t "F The ThiBrHEI
PHILADELPHIA, July 2J.-Wi,h its siege and
mia guns. hts oas-Uu ANA auuuancct, mu.het'' s"o
i she'll AMI it, painted wooden horses VERY NATURAL
py the vay) hao.scd TO transport uowi'zcr battery.
the Eu,,Ian Government make, an imposing military
Jspay. TIE largest cannon i ala sHuch rhc With si&
IRON icGnfDIcrs sIruuk ulou II, AMI bf'.ch."IdhE
srrau-.uyii somewhat similar To krurp's. Tie bore
extends clear through the gun, aud Is cat Oh h,A tie
r.rso rc. by bIcocb'ock tnat is drawn Ia enc SHE by
~,. To- admit the charge. TN, system j. ia uSc on al
fI smaller .us five in uumbyIa G-nch rife, two lar
bras, howitzcrs. small naval steel gun, and a brr'
ue,d piece. Some effective brccchloadug system for
large and small ordnance is now employed ~ every
European country, bat our Government, which was
behind al the rest of the world IN adopting brcccG-
loading mushcs, yet made almost no prolcss IN
the direction oi di~rrdns us OIL mlz Au-loddhs Rod
mans, Dlblsrca's, aud PARROTS.
TIE difference engine, invented 10y Geo. Il. Grant 81
Boston. whose workings were explained 10 tie American
Academy Of Science at its meeting III Philadelphia ia-t
FlU by Prof Faluan Rogers, is exhibited by tue Uni
yr,.stv Of Pennsylvania. IL constructs large matAc-
uliicil tables, such table, Of Ioarthm sines, tan
r.ui. rrcprocaIs, square and cuuc roofs, computes
terms, and prepares mold stamped IN wax, from which
an clr.'ruiype plate is made ready for printing The
mach!u-thc only Of kind in the worlds eight
fcct and Ave feet high contains 10000 pieces. ana
cost about $4,000. II presented TO the University
by Prot: Rogers. 4 small calculating machine 10y the
same inventor is also shown, which performs suc sim
ole operations as multiplication and division with great
rapidly aud Of course with perfect accuracy it consists
oiA0O pieces about foot long by dix inches high, and
cost, only 300. French machine for the same pur-
pose was exhibited in Vienna, but 1t was more complex
aud more expensive than this There Ia other Amcri
can invention of the kind
notable feature OF the exceedingly large and com
rrchcnsyc display Of printing macincrya display by
the way that far exccls those made ut the Vienna and
Paris EXhitious-ls the number and variety OF little
hand-pressrs for amateur Every his own
printer" is the motto on the circulars distributed by
Of the exhibitors No doubt these presses with their
outfits ~ type may be useful 10 business
at a disancefrom regular printing Offices and they
certainly Instructive playhrg7 for boys but it must
not be- imagined that they make those who use them
printers Printing an art and il not 30 be acquired by
the purchase Of cheap Of Its documentary tools any
more than painting can DO learned by buying toy box
OF colOrs.
In Annex No 2 to Machinery Hall-a building which
but one visitor in ten finds his way tots large
circular saw for cutting stone, shown by Pittsburgh
firm The teeth pointed with rough black diamonds,
and the manner In which they SET as TO bring
each one true with the periphery Of the is not the
least important part OF the invention. In 10 minutes
time the saw, which is To inches in diameter, cuts
through block OF hard sandstone ~ feet long by 30
inches thick making only 100 revolutions to the minute