The sun. [volume] (New York [N.Y.]) 1833-1916, 1893-10-15
xorrs ~ scrrror avn rDUsrsr.

parting waterproof quality to cotton cloth
have proved only measurably successful be-
sides being somewhat complicated and trou-
blssems. The latest and most effective
method. 90 recently described. 10 claimed to be
free from the objections heretofore enooun-
tered. and consists, mainly, in frat drying the
fabric thoroughly in dry heat and
sss 'Rssdp Ssu.h ts m Sssa with sn5
athIn coat 81 boiled oil. which. after having
become perfectly DRY. is treated to a second i
Ssins sPoSsd betwesS each for the eject
the operation on the fabric to become perfect.
face remains sticky. mixture Of one-fourth
SSsn snS Ss q s PSn sm 4sss
painted oyer the surface. Fora yeliow water
pEoot i yellow ochTc smbloySSd and iGra
mixture with the sheilao.
The preservation Of pictures has now be-
come in London. It would seem. as the result
OF some very ingenious experiments. n regular
scientific proceeding. 1.-THE accounts given arc
to DO relied upon II 10 simply placing the sur
face OF the picture, be It OF canvas or paper. In
q vacuum. thus protecting 1t from the usual
atmospheric action which 10 SO deteriorntinR.
In carrying out this plan the picture Ia en-
na fnd back s al and vase
from the sides like an ordinary. frame; In the
edges o. this case plate Of glass is inserted.
sssied to the metal. The air Is then With
drawn from betwoen the surface Of the picture
s sns as as' apf sas ne sest
nlan 10 to com pieteiy protect pictures from the
Sn to punns as Ss
posed or framed In the ordinary way.
An interesting departure In engineering 10
. trA~ ln ntto Mt Stp nxtnn fnr Ian
service. aud tho plan Is commended By SO
good an authority as the Age Of Steel One OF
the great electric illuminating companies. It
appears. has adopted them In its work, and
concerning their economy In respect to space
and power Il 10 reported that the land engine
takes up some ten times as much space MS
pansiOn snsine has ten times, the nea,Ipr sur
face. Of the land engine Further the new
Hs. q q. zig eSns
three-crnnk engine, occupies also 30 per cent.
less room. and carries regularly 30 pounds Of
pounds Of steam. and gets one horse power out
Of from four to ter. pounds Of anthracite oonl.
develops one ehorse:power out OF one and q
quarter pounds Of Welsh coal. that H. accord.
sS ns as ss
marine engine to produce the same power.
Asystem Of moistening the air OF q cotton
IhoUOTy-hs 10 EeQulTcu iu some departments Oh
MIL. before blowing 1t into the rooms-has
been the subject Of much experiment. 1t has
been found that. II q Jet Of steam or vapor 10
discharged into tho main duct. any degree Of
humidity desired can be obtained. but all the
air IL moistened alike. being distributed to the
difierent rooms by TIE risers leading thereto:
ohs ThEA ad m ms Sy
~ RseuD .Hx l05 'n %eiss
walls duct. a MARI rsef as'
10 now found that this objection may be- over
sRreasa pans
posite each opening 10 the due. through which
he sr h ,ss now az S,n Gss
drives the blower flows into the. room. and.
from the due, u thus distributed thrsaSSoat
the room, Experience with this plan through
cold weather has proved Its peculiar value.
In order to meet the objection presented,
especially In transit. to the great disproportion
between tho weight OF the reels or spools and
that Of the silk or cotton wound on them-in
some instances "a per cent. of the weight
being wood and only 10 per cent actual silk
Q spool has been invented. according to the
and Inches ana
o. II is
mad. Ism se.ais1s Il. sSssei
SScs re,ansa n the n' T TSd
e Tie dsssment S tho seos. ssgeois sH whss
exported to certain countries. The silk. cot
or fsp' ESsna IL
the length Of silk required to be wound upon
stopped as soon as the necessary length has
been reached. Ten OF these spools, when bare
he same as one ordinary empty reel a and s each
spool Is capable Of carrying the same length
FOR o g %
less than for the old.
The latest reported improvement in lamps
10 device intended to obvIate the objection
able shadow thrown on the ceiling by most re-
yenerative lamps. and to overcome some other
features which detract from the value OF the
The difficulty Of the shade thrown
upward is met by forming tho upper part OF
he lamp OF etched ornamental glass instead |
u having mst9lIio dome. as is ordinarily. the |
without the loss. Of any downward iisRt"two
streams OF hot air are supplied to the burners.
Which Is Il esss other bsns
point dealt with. in this eonstrustion. is the
WS such amps fsas Is aspn
,othinR. first by the, small amount OF gas |
burned per hour and the perfect combustion |
obtained. and next by the products OF combus-
ion being emitted from the lamp latsrnlIy In
tsnd Of being projected upward toward the |
'eiling. This arrangement has tho merit OF
impllcity. and the effect is very satisfactory.
One OF the most Interesting contrib buttons to
PRACTICAL science has been made By Prof. Tyn-
all In respect to cleavage. or laminatlon. his
proving that any material. no mat
or how plastic or how homogeneous It may
10. has within II the condition or the develop
nent 81 cleavage. and that the only external
suficient degree OF pressure exerted in one
ERECTION upon the mass; tho resulting planes
Erection In which the pressure 10 applied. The
philosophy OF this effect, rs explained. lies In
he Tact that. az relates to the cohesion OF the |
articles. no substance Ia strictly homogeneS
us-that 10; the PARTICLES. grantees or mole
over equally In all directiois. consequently.
then pressure 10 applied to them, they slide
"a |