The Delaware ledger. (Newark, Del.) 1879-19??, 1883-10-20
The Field of Science.


"A species of spider has been found |
on the African coast whose web, long
and firm, resembles yellow silk. An at
tempt will be made to introduce it into
France.
-Brohme's experiments seem to show
that in the plant there are two operations
taking place-making sugar from car
bonic acid and the converse of the same
sugar into st"rch.
AT the Fisheries Exhibition in
London may be seen lobster, sent from
this country, which weighs about twen-
ty-eight pounds and is three feet long.
One of its claws weighs eight pounds,
M. Herve Mangon calls attention
to the case with which EGGPLANT can be
cultivated on large scale as source of
potash. According to him the fresh
plant contains about half of per cent.
of potash.
| cottonwood lumber is said to be
well adapted for the manufacture of
cases for packing dry goods. As it
readily imbibes moisture, and therefore
swells, it will not do for house-building
purposes.
"A writer in the Cosmos Les MondeS,
proposes to dissolve zinc in hydrochloric
acid, to sell the hydrogen gas for filling
balloons and to utilize the zinc chloride
as disinfectant. The article hardly
appears TO he serious one.
DIR. A. Houzeau points out that the
influence both of light and heat has q
tendency to reduce the amount of am
monia present in rain water, and attri
: butes this diminution not to volatiliza
ton but to absorption by the organi,
: matter existing in the water. - Al
) Some paper used for caaop1l- a."
articles of elegance wy yici -9Iering small
the Contiir = seI 81 Of By shopkeekers on
in thCteriaIent of Europe, and especially
i eais tse West End of 4 ondon, closely re
sembles satin. Ordinary paper, covered
with asbestos powder, dyed to any desir
able shade and properly fixed on witt
weak gum gives the satin effect.
! DIR. A. Mayer says sourness acceleI
! ated when milk is heated at 45o, bu
retarded, if heated for twenty-fou
h hours at $50. In the latter case, how
A ever, the milk assumes burnt tast'
For the preparation of condensed mil
it is recommended to use PARTIAL
= creamed milk, as it decomposes less raj
d idly.
r The estimated value of the peanr
crop of the country is S3,0OO,0OO.
9, According to Eggertz, steel mat
y. from an iron containing 50 small a pr
portion as 05 per cent. of copper
d, found to be worthless.
Although Russia has vast beds
er coal she imports nearly half of what. s
OK uses, chiefly through lack of intern
yo communication.
"A wonderful mineral is found OF
u in Missouri. 1t is called Adams cobb
IT, and it is so hard that it will cut ST.
m without losing its edge.
NJ Two tablespoonfuls of Epson sa
~ dissolved in pint of lager beer, and
'n piled with brush will cause glass
-. appear frosted or ground.
1t is found by the survey of
In Great Lakes that there is slight t
~ in them. but not of sufficient extent
be noticeable without special care,
om amount of rise and fall not exceed
itb two inches
Oil of white birch bark dissOl'
lily. in alcohol when applied to fabrics I
ders them waterproof and preser
,le them from the attacks of insects vi
hat out in any way seriously impairing
appearance or the pliability of the
q II terial.
Suppose we have a square tank
ro wish to make round one 10 hold
lent same number of gallons, how shall
her get the size ? By this rule: Multi
verv one side of the square by !. 1913, the p
uct is the diameter of a circle of et
an area.
iden -Perack, in the Malay Penins
say now produces about as much tin e
year as Cornwall. Last year Pc
wer. exported not less than 700 tons of
ined valuable metal, In the mining W
there are 10000 Chinese employed
ried, present.
arel The Journal de Phdrmdcie give
here following recipe for mucilage W
will unite wood, porcelain or glass
told eight and one-half ounces of st
d to solution of gum arabic add tw
Mt of grains of solution of sulphate o
anne, umina dissolved in two-thirds OF
way, ounce of water.