The Roanoke times. [volume] (Roanoke, Va.) 1890-1895, 1891-05-29
sCIENcE AND INDUSTRY.


An ice company at Dallas, lex,
proposes to manufacture $50 tons daily.
"A factory for extracting tho juice OF
palmetto berries has been established
ut New Smyrna, Fla
Several attempts have boon made
to establish the tack industry in the
South, but they have failed from diff.
cultles In handling the material This
branch OF the iron trade is in tho hands
OF Now England manufacturers, and is
practically confnod to Massachusetts.
1t has boon understood that tho
curcIlio beetle, which is 80 destructive
to the plum, produces two broods year.
Prof. c. p. Gillette has now demon
strated that, in Iowa at least, it pro-
duces but single brood. Tho young
found late in the season are from bo-
lated females. A parasite insect, lSig-
dphus curculionts follows the insect, and
preys on them in considerable numbers;
but with no appreciable aid to the plum
cultivator
Masters of vessels can not be re-
minded too often of tho use Of oil in
stormy weather. Its Importance is well
illustrated by facts now referred to at
length in standard books on seamanship
and tho International Marine Confer
ence at Washington recommended that
the several governments require all
their sea going vessels to carry q sufYi-
ciont quantity of animal or vegetable
oil, for the purpose of calming tho sea
In rough weather, together with suita-
BILE means for applying it."-Pilot Chart.
The different heat-conductingp powers
of metals may DO easily realized by
holding rod of silver in one hand and
ono end OF rod of iron in another, and
on placing tho opposite ends in a fire,
the fact is soon perceived that there is q
great difference in tho heat conductiyity
Of the two metals. Tho following table
shows the relative conducting power OF
the principal metals: Silver, 100; copper,
"a; gold, 53; brass, "a; tin, 10; iron, 10;
lead, Q; platinum, s; German silver, 6;
bismuth, 9.
-Evolutionists have got SO far in
their studios as often to Indicate with
confidence the origin Of certain genera
as we'll as species Tho celebrated
French botanist, Baillon, has recently
pointed out that Hottonia, q well-known
aquatic genus OF Primulaceous plants. is
certainly derived from the true prim.
rose or Erimutd, and that the generic
changes were brought about purely by
some ono species OF Irimula learning to
live in marshy places, and thus nssum.
ing aquatic habits.
In the course OF archaeological ex.
plorations lately carried on in the
Crlmea, Prof. Vasselovsli found painted
human bones in two graves-six skele.
tons in one grave and one in another.
Prof. Grempler, Of Breslau, is of opinion
that these graves belonged to the oriZi.
nal inhabitants OF the Crimea, the Gin.
merians of IIcrodotus. They laid their
might consume the flesh. When quite
bleachcd, tho skeletons were painted
with some mineral pigment Several
graves containing such painted skcle.
tons have boon found in Central Asia.
Only thrco had been previously found
in tho Crimea.
Tho twenty-eighth annual report oil
the government cinchona plan ia ton and
factory in British saSkim has been
issued. At the end Of the financial yoar
1SS9-90 the plantation consisted OF
1852, i01 trees of various ages, and of a
nursery stock amounting to 2G4. DOC
seedlings. The crop collected during
the year amounted to SOL, 7O5 pounds.
Tho products OF the factory wero |. S3:3 <
pounds of sulphate OF quininc. and G, SIS
pounds of febrifuge. Tho whole of the
quinine and the greater part of the feb
rifuge were manufactured by tho nov
fusel-oil process, and as the arrange
ments for working this process were
quite completed during the year. the
old acid-and-alkali method of manufac
turo has now boon definitely abandoned