St. Johns review. (Saint Johns, Or.) 1904-current, 1904-12-09
.k]NgNSCience
NssIFrivefn1tion n
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A new vegetable for table use Is tne
Crambe tataria. an umbelliferous pant
resembling sea kale. The sweet roots'
raw and cooked are eaten by Tartars
and Cossacks, and for these ana the
sprouts also, It is recommended Tor cui-
tivation by a prominent member OF the
Academic de Cuisine OF Paris, VINO ue'
clsres that IL is finer In flavor than
aspara gus and cauliflower. which II
suggests. The roots are boiled In salt
water and seasoned In butter. a salad
Of young leaves and slices OF roots oe-
ing another dainty luxury.
Additional particulars about the new
species Of white potato, which Is now
cultivated in France from plants FOUND
in Uruguay, Indicate that Its Import
anc, as a substitute for the irish po'
tato has not been exaggerated. org
inally very bitter tuber. the new veg
etable becomes. after three or four
years Of cultivation, an admirable food
product. Its yield Is enormous. and II
is exempt from the maladies that at
tack the ordinary potato II grows
best In moist soil. its native habitat
being the mnrshy shores Of the River
Mercedes in Uruguay. It's flowers
have q Jasmine like odor, and n dell.
cate perfume has already been extract.
ed from them. After one planting the
plant perpctuatcs itself from the brok'
on roots left In the soil.
Recent advances in the price Of shcl.
lac. due partly to its use IN electrical
works and IN making gramophonc rec
ords. have led 10 the collection Of facts
about lts production. Lac is an In.
crustatlon on the branches Of certain
trees in indln caused by insects. II Is
found throughout India. but is most
abundant In the Central Provinces
Bengal and Assam. II Is collected 10y
natives. who break on the lncrustcd
branches. The gntherers and local
dealers sell II In the form or stick
lac" to manufacturers. who turn II
into the shellac. or button lac" OF
commerce. Nearly the whole Of the
shipment takes place from Calcutta.
and the chief markets ARE the United
states and Great Britain. In India
lac II made into bracelets. rings, beads
aud other ornaments.
The apparatus by which Dr. Arthur
Korn, n German inventor. has succeed
cd In transmitting photographs about
jD0 miles over telegrnphand.tclcphonc.
lines depends for its action upon the
changing electric resistance Of sclenl.
um under thc influence of light Of
varying Intensity, A ray Of light.
caused to pass systematically over the
surface Of n transparent flm contain.
ing n photograph. falls upon a selenlum
cell whose electric resistance varies
with the amount Of light passing
through different parts Of the photo
graph. These variations are transmit.
ted 10 the electric wire and at the re-
ceivlng end they vary the illumination
OF a small vacuum tube. which passes
over q sensltiked Photographic paper
synchronicnlly with the ray of light
moving over the iilm at the sending
station. Thus n copy of the original
photograph IL produced.
Although the problem Of color pho,
Biography II st'll far from solved, prog
rcss In being occasionally made. 4
new German discovery -lhnt of Dr,
Kocnig rlates 90 printing from tri,
color negatives. aud depends upon the
Use Of paper coated with collodlon ~.
intionsof colorless compounds of green,
ish blue. cherry-red and yellow dyes
that develop the original colors on ex.
posure 10 light. The SET of three mega.
lives ID first made under the usual light
nllers, The printing paper is hrst
coated with the solution ~ the dye
that IL changed by light 10 srcenish,
blue, and, after drying. Il II exposed
abou, thirty seconds under the mega.
tive taken through the red ilier. when
the required depth of color Is reached.
II Il fNed In a solution which removes
the unaltered dye compound. The pa.
per Is then recoated, this time with the
eollodion for the red print. aud eN,
posed Ia exact register under the green
negative. After this Is fixed the third
coating is made. ana the yellow Image
is developed under the blue negative.
Nx W.ra and Al.