The Bolivar bulletin. [volume] (Bolivar, Hardeman County, Tenn.) 1865-1888, 1871-07-21
NO.
CURIOUS AND SCIENTIFIC.

| CUKlUA6 AND SClEAIlEICs
! WOVEN BAGs.-An English inven.
tOE has just patented an improvement
in weaving bags without any side
scam. 1t does this bV having two
sheds of warp, and the shuttle carry
ing the Weft passes through one shed,
and back through the other. This has
been done for some years in this
country; it is therefore difficult to see
of what avail the English patent can
be if contested.
! SILK IN AUSTRALIA.-The AccIi-
matization and Agricultural Societies
Of Great Britain have been directing
| their attention to Australia as q coun-
| try supposed to be well adapted to the
cultivation of silk. 1t Is now an
nounced that specimens of japanese
cOcOons, with eggs, implements, etc.,
have been forwarded to Sidney by
| Sir Henry Parkes, from Yokohama,
and experiments to test the adaptation
Of the country to silk growing will at
once be instituted
| FOG SIGNAIs.-An instrument pa
| tented recently in England is, accord
| ing to the English Mechanic, a great
/ addition to former means of signal.
ling vessels In fOgs, or by night, when
lights are not at hand. 1t is q fog
horn, with double tongues or reeds,
the tongues being tuned In unison
| with each other, and Yibrated by air
passed through o bellows. Small sizes
/ for use at ferries, easily worked by
hand, are said to make a roar that
viii penetrate the densest fog to q
long distance.
PRESERVING WoOD.-A New Or
| In Il Fn1
| for preserving wood, which is des-
cribed as consisting in treating the
wood with rOsin. It is claimed to
protect wood not only from decay, but
| from insects ald the teredO Eavals, so
| that ships bottoms, if made of wood
! so prepared, need not be cOppered.
| Cross-ties for railW ays are preserved,
/ 1t is stated, for 5 cents each, which is
| cheaper than can be done by many
| other processes.
PROPEILING STREETCARs.-AN New
Orleans inventor thinks he has solved
/ the problem Of street car propulsion
/ by the use of q tracing rope worked
along the track, either above or under
| ground, the rope to be moved by the
fraction of the rope upon the traction
! wheels The rope engages the wheels
in the following manner;-Three
wheels are used and the rope passing
under the two out side ones of the
group passed over the centre one,
making a loop which holds very
strongly. We see very many practf-
cal difficulties in this plan, and do not
believe it can be successfully worked.
A NEW THEORY OF COLOR.-The
three primary colors were formerly
thought to be red, blue and yellow.
1t has been lately disputed that this
is correct, and recent experiments
have been performed to show that the
real primaries are red, green, and blue.
1t Is stated by the advocates of the
new theory that yellow may be pro-
duced by the admiXture of red and
green, or rather by the production
simultaneously of the sensations of
red and green on the retina of the eve.
They claim, also, that the simultane-
Gus sensations of red, green and blue
viii produce the sensation of white.
Whether the formerly received no.
| tions Of color will be OVerthrOWn bv
these experiments remains to be seen.
They will, however, doubtless serve
to show that In this field, as well as
| all others, we are very far from having
penetrated the secrets Of nature.
SOMETHING NEW IN THE CANDLE
| TRADE.-A London firm proposes TO
| introduce into market a novel firm
! candle. According to the Scientific
! Review, they-"form lateral apertures
| near the lower ends of candles, COM
munieating from the outside with
internal longitudinal passages, which
In issuing in close proximity to the
flame, will produce a more perfect
combustion, and thus increase the
| 7rr-, IN, .
| apertures may be formed either by the
aid Ofdrilling instruments, or bY anv
/ other suitable means; and when the
candles have enlarged, ribbed, or
grOOVed lower ends, the apertures
| may conveniently be made I'm the
grooves thereof. The longitudinal
passages may extend either nearly up
to the top of the candle, or they NAV
pass right through the candle.
IMPROVEMENT IN CARPETs.-Ac~
cording to the American Artisan. two
Philadelphia inventors have patented
| an improved carpet. It is thus de-
! scribed:-''The carpet is composed of
/ warp threads, and alternate thick and
| thin filling Of welt threads usually en-
| plOyed in making carpets Of this class.
/ The warp threads, however, in pro-
| ducing the improved carpet, are raised
in couples for the thick filling, and
sihgly for the thin filling, as fully ex-
planned hereafter, SO that the fabric
may be more cOmpacted in texture,
and may have a finer surface than
ordinary damask carpet, without the
| consumption of more material than
the latter requires. The sound part of
! this invention, consists in the use of
/ certain shafts in combination with
the jacquard, whereby the warp
! threads may be raised singIy, whilst
the jacquard raises the warp IN couples
alternately"