The sun. [volume] (New York [N.Y.]) 1833-1916, 1891-08-16
NOTES ON SCIENCE AND nDusrnx

worked by electricity. being the largest pair Of
cranes In the world. but ono crane. that In
the gun works at the arsenal in WASHINGTON.
excslline either OF these in power. Each Of the
cranes Is Of twenty eight feet span, and fitted
With two troleys CAPABLE respectively Of liftins
nifty tons, thus giving to each crane power
81 ino tons; the electric power .
The. shops turn out an average OF 500 loco,
these cranes. ssn handle the snslrs ouspaa The
adjustment Of tho cranes being such that they
g snd ss en IN.
glue completely over .another. In the boiler
sna :i nsr's WITH sasf: sss SSr q sim s
pounds each. possessing the same character ~
to nice ad'Ssttmsnt and ready response ts to shs
crate ones: This ARRANGEMENT q Wheels =
A paper on the superior vslue Of cork esvsr.
ings for steam pipes and IS protection Of
water service pipes from frost has recently
been published By French engineer 40.
cording to this paper. one variety Of these COW
orings which 10 found TO DO very enioisnt con.
sists OF pieces Of cork. shaped to 1T the differ.
ont sizes Of pipes. with radial joints similar to
to tho slaves Of BARREL which are placed
around the pipe and for the time bound 70 the
pipe BY strings. After the pine so covered bss
coll besn sadaeiensy dried. The efcvicss are
f1lled In and the string replaced by wire-elbowa
the sS sed T.. pores
crevicee are closed by coat Of paint or lime
Sosks 81 eere abons Sns
fourth inch wide. and VARYING In thickness.
ei an Of nsn Sl Sp:. nf oa Dis ss
inches In diameter and upward. and csmsnted
- s hs
band Of waterprooied canvas Tapped in the
cork bands. the whole being sitsrWari eovssSd
By thick coating OF paint or tar.
Tho assertion is made BY workers IN orna.
men,sl wood that yellow pine hard flashed IN
oils. 10 the rival In beauty OF appearance Of aAy
wood that grows. net excepting the costlisst
OF the well-known hard species, Il being sus.
ceptible OF receiving and maintaining as hiRh
. degree Of polish as any known wood. while,
when impregnatsd with oil, It 10 we'll nigh In
p sSsa Ssna 1aaaSs ppoS
erty Of being impervlous even to, hot
apon saSS great Is yasss
q hs w9 os inc ns white Pine y, mapc ~
aaait, Tsferr.d to Is the l9nslssi pns q
pinus austraiis. In TECHNICAL classification, and
snd ars iound IN shs
having q curlsd grain somewhat similar .
sas 81 qssf %sSd
beautiful work for cabinet purposes.
Some additional improvements in the eovsr.
ing Of pulloys are announced. By one Of which.
IS is claimed. flfty per cent more power can
be transmitted and all slipping reduced to An
imperceptible factor. In accomplishing this
the primary point 10 tho employment Of Q
specially prepared leather covering for the
pulley which Is extremely soft and elastic and
never glazes By the rubbing action Of the belt -
Is the case when ordinary leather 10 employs6
for the purpose; It 10 applied to the pulley al
cial cement made so as to be soft and 70 rsmsil
80. unlike ordinary cement or glue. no rivets 81
ARMY IRON q she ~ IL
ss5.s. % ss l.5ssss S Ss.9 :s:sa
: 5 hs wbos ~ %b Of A.
water ara dryl9s; following th,s. he pspsr e
%h ssnnlo sssd snd
applied Is above: Some prefer 70 odd .
s:s = s,'iF e: ss:is
Ashort time ago boiler WAS eopstruetsd b
Manchester. Eng. with view 70 testing the
practice advised By some. In case Of shoItAsa0
Of water being discovered. OF turning on the
feed watsr-a somewhat startling method 81
procedure according to some. In these tests
the furnaces were barred Of water By opsniAa
the blowon toook and allowing the watsS 10
escape while good bright fires were burning,
hsn 20 mss
tin. and zinc. the feed was suddenly turned On
Wasa to ne
esss as |. often assumed was this followed
svs ono % case aesusy sdSs.
tion Of pressure took place. The one mlehaD
ads s,a NOT e
81 s as
found to be- a. much as one-haif inch. The
nadvisability Of hurryine fires whom raising
Iron ropes says writer IN tho Engineer win
give entire satisfaction. II operated under
proper conditions. whom tho work to b done
is not too heavy. but steel ropes should bs SUBJ
stituted for iron whom lightnsss 10 required,
or whom creator strength becomes necessary.
the object OF such substitution being 70 de-
crease the wear rather than reduce the sire Of
the rope: there should be no coilinG or I'M
colng Of wire ropa like that OF hsmp. but,
when not on . reel. should be rolled upon
covered thoroue6ly with raw lnsssd oil
turs forming protective surface which pre-
serves 1t from undue wear. To preserve wire
busheI Of fresh Stacked lime to = barrel "a 81
mineral or vegetable tar. boil well. and saturatS
tho rope with the mixture hot Too much cary
drums over which the ropes are run-ihat 20,
the grooves should he lined with well-seasoped
leather. or some soft metal. the lie OF the rope
being thus greatly heightened ana fltmer I'd.
over smooth and hard surfaces. The greater
the diameter OF sheaves puileys. and drums
the longer the rope will last
The manufacture of glass bottles BY msehin.
err. undertaken awhile ago by q New Jersey
nu'acturer. has not only proved . success,
but appears to POSSESS some decided advaA.
tases over the ordinary method. even with the
appliances and processes as thus far developed.
Gathering tho glass in the usual manner. II 10
SLOWED 10 run from tho rod into an iron Gun.
which holds tho. quantity needed for max.
Ing the bottle when a hollow iron punGes
through tho mass. aud the cup reversed,
wing the glass in, a plastic condition sue.