Richmond dispatch. [volume] (Richmond, Va.) 1884-1903, 1896-05-21
Notes on Science and Industry.

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made to obtain an accurate imitation OF
wood in glass have now been successful.
Tho process by which the effect u pro-
duced is quite simple, says the Uphoi-
sterer and consists I'm clouding n sheee
OF plain or ground glass on the reverse
side with a liquid dye OF a proper color
to represent any desired wood, the dye
- applied by means OF a sponge. 50
manipulated as to bring out the SEM
blance OF the grain OF the wood on the
glass surface A badger brush Is used to
soften the shading. and the glass IL then
covered with varnsh; this leaves the
grain clear. distinct and fast, without the
necessity Of using any gelatlnous sub
stance, which would render II liable "a
shrink into crinkles, thus spelling the ef.
feet To complete the operation the
glass is heated slightly. and the various
shades required for the particular wood
are caused 10 spread over II by means OF
a syringe, the merging OF the shadings
into each other being prevented BY slight
~ heating the glass The whole IL made
OF a semi-transparent aspect by means OF
another coat Of yarnish. which also pre-
serves and protects the dyes, and with
this final dealing the exterior surface Is
made to present the appearance OF nigh
ly-pOllShed WOOD nhlsn.
The practical solution of an interesting
geological question Is credited 20 Nor
denskjold the Swedish scientist, IN show
ing that water can be found by boring
into granite and other crystalline rocks,
10 a depth OF from 100 20 40 feet; briefly
he proceeded on the thory that the Varia'
tions in temperature ought TO cause
hot the and
lower layers OF the rock, In such way
causing horizontal creyices into which
water from the surface would percolate,
and the water would also be fresh.
well was sunk In the islet OF Arko, or the
Swedish coast. In 1894. and at the depth
OF 40 feet fresh water was found, sup
plying (. 400 gallons a day. and since then
six other wells have been bored, and
water found at about the same descent.
the object OF the research being TO pro-
vide lighthouses ana pilot stations with a
permanent and plentiful water source.
The engine which has been running IN
philadelphia by means Of sulphids OF car
bona yapor claimed TO be an enicient
substitute for steam by many-has drawn
considerable attention TO the experiments
In this line made BY J. II. Bennett, OF thas
city, and have an important bearing upon
the opinion which has been held by soma
that such yapor has a destructive effect
upon the metal; II Is claimed that his
experiments have not only disproyed
that idea, but have demonstrated that BIZ
suIphide OF carbon Is both cleanser ana
preseryer OF iron and steel. Again. for
the purpose OF comparing the power de-
rived from steam direct, and that from
chemical vap0r generated by the sams
steam; both the steam boiler ana ina
yapor generator are connected 10 the
engine by a common supply pipe through
valves that are conveniently arranged
for alternate connection 20 supply. In
practice there would be only the connec-
ton between the generator and engine
the steam boiler acting solely as
heater The boiler Is OF the common
tubular horizontal type, upon the tor
OF which is set the generator. composed
OF a steel drum within which Is the
cylindrical receptacle for the bi-sulphide,
supply connections 10 the engine are
made IN the conventional manner, ana
the vapor exhausts into the condenser.
which il the common arrangement OF
worm or COIL surrounded by a water
jacket.
4
OF commercial mica have OF late to cont
into surprisingly extensive demand. fai
beyond what is supposed by those FAINT
liar only with its longtime insertion In
stove fronts. The three principal varie-
ties employed are the Muscovite or white
mica, the phlogopite or amber mica, and
the biotite or black mica, The first occur
in greatest quantities IN GRANTEES an<
gnelss. and IL much used for stow,
panels. for which purpose II must BE-
clear and free from spots, the best being
| Of a ruby wine color when II blocks. the
white color coming next in value; phioso
| pite IS used for electrical purposes. an(
| should be smooth. free from wrinkles
| and crevlees. must split easily. also b.
\ very flexible and able TO stand - hlgi
| temperature without disintegrating. while
| dark spots lessen is value Waste mica
| is ground and used as a lubricant fol
| heavy bearings. In certain insulating com
| pounds, for DECORATING wall papers. &c.
| and as a fertilizer. Scrap mica. anothes
| feature OF the trade. Is made up int
large sheets By process wel-known 1