New-York tribune., 1876-02-26
APPLIED SCIENCE.


Album. Both remarkably prcpossessng faces
APPLIED SCIENCE.
TIE TASTE OF TUkNIPs IN MILK AND BUTTER
IL is stated, upon German authority, that the un-
pleasant taste impaired to milk and butter by feed
ing turnps, &c, may be removed by simply throw
ing into each pan of milk of four to five quarts. ms
IDnch satpeter as will lie the point of q knife,
when geatnOns mass Will separate from the ihilk,
and settle to the bottom
STEEL BRUSHES FOR CLEANING IRON CASTINGS
The removal of sand &c, adhoriug from the m0lds
10 iron castings generally accomplished by filing, ID
said to be effected far better by means OF STEEL
brushes, placed in the market by Berthold of Dres-
den. They are made Of thin strips of steel. in the
form of ordinary scTubbrs, and also III that OF whltc-
wash brushes, and reported to remain sharp Tor
long time, and 30 be far more conN Nenlent III use
than the hle.
New BLACK FOR WooI.-Wool dyed black ac-
cordng to the following recipe 1T is said. does not
rub off in the least while the ibers remain loose and
open and it has a desirable reddish cast. Boil the
thoroughly washed wool well for hour and a hall
in a bath composed, for 100 pounds of wool of gig
pounds of chromate of potash, 2i2 pounds of alum,
- pound of blue vitriol and pounds of commercial
sulphuric acid and dye it, without rlnslng, IN fresh
water, with 20 pounds of lOg-wood aud 20 pounds of
Brazilwood. 1t is advantageous for the color to
allow the wool to remain in the mordant for II
hours.
PREPARATION OF COPYING-INK PENCILs-Ac-
cor,ling to Viedt these pencils OF substitutes for
ink can be prepared by making thick paste oi
electriatcd graphite, finely powdered kaoliu. and
very concentrated solution of vi0let-Glue aniline,
soluble water, (Or Of other auilne color so!u-
bic III watcrl aud pressing it. ny means of n small
=. A N
If an inch thick. When dry they are fit for imme-
date use The prop proportions of the ingredients
can easily be ascertained by trial ana perhaps gum
arabic be substituted for the clay ~ "A cement
ANTI-FoULING CoMPosIuoN.-It is said that the
copper sheathing of the two royal English yachts
Alberta and Eliin were in 1873, at the command OF
the Admiralty, painted with Jesty's patent anti
fOuling composition, in order to prevent the ad-
heSon of grass and other Substances. These two
vessels have been again docked in Portsmouth, hav-
ing in the mean time lain principally in harbor. The
test of csty's composition was very satisfactory.
All portions of the sheathing found To bc Tree
from al0T or other substances, and renamed pre-
clsely they were at the time they were hrst
painted, excepting some very small spots under tile
stern where a green slime had formed OF the thick
ness OF sheet OF paper.
REToUCHING VARNIsH FOR NTGATvEs.-It is
claimed that a film of the following vaTnish on mega
tives as suggested by MonckhOyen can be retouched
with brush or lead pencil three or four times a.
rapidly as one of gum Add common shellac in
scales, to saturated aqueous solution of carbonate
of ammonia. After - hours, pour of the clear
liquid add about an equal quantity of water and
bring the mixture slowly TO boiling while cOntinu-
ally stirring it with glass rod. brown sheac
solution is thus obtained and there should be about
100 parts of water TO eight of slellac and no 0dor
of ammonia The negative, after being washed;
should be flowed with distilled water and allowed
to drain and should then be coated by flowing the
varnish over il twice in succession. Alter drying
the coating is brilliant and hard, and in>oiuble in
water. If many prints are desired; the reiouchcd
negative should be vanished as usual
OBSERVATIONS on BIDDS.-Onithology has adj
vanced greatly in this country during the past few
years, and OF its longest strides has been IN the
direction of a knowledge of the mgraions of birds
and of the causes which bring about these seasonal
and united movements. But to ascertain what in
Huences act with most force much more information
is necessary, collected over wide and through
successive seasons. The Forest and Stream Of this
city suggests a series of points upon which ohserva
tions to be published, especially useful and de-
sirable The queries are expected to bring replies
that shall give the comparative abundance Of birds
in the Observers region, the dates Of arrival de
partuIe nest-buidng, laying Of eggs, and Matching
of young the effect upon the relative abundance o.
particular species in retaIdiug their arrival or
Mastering their departure that sudden changes oI
the weather, storms, and early and late seasons al
pear to have ana parallel notes upon thI appeal ,
region, and upon the times Of Towering OF plants
also solicited. The Importance of collecting such
dates is evident; when sufficient amount of them
Is accumulated students viii have tue material Tor
new advances III biology.
NUTMTIvE VALUE OF SHORTS MIDDLINGs, AND
SHIpsTUFF.-Analyses of Prof. Storer show that
11.n
food for domestic animals In the latest tables NJ
Wolf Of the Agricultural Experiment Station at
Hohenheim in Germany, European bran is reckoned
as worth II per cent less than rye and 80 per cent
more than average hay. These estimates are based
npon the amounts of actually digestible food ingre-
dIen.s contained in them, certain values per pound
being assumed for aCuminOds, carbohydrates, and
fats. Taking rye the standard, and calculating
what number of pounds would contain one dollars
worth of these ingredients. the same number Of
pounds Of European bran would be valued at 81
cents, st. Louis "sipstutf" at SO cents, and corn
meal at 81 cents. The middlings and sipstuif con
tain less of abuminoid and fats and more of carbo-
hydrates than the shorts or bran, but must be
trifle more digestible. The estimated value would
not differ greatly from that Of the bran or shorts.
" II is worth noting" Prof. SfOrer remarks, thai
the ash of bran TOR shorts contains an nnusally
large percentage OF phosphates lover 30 per cent oi
tins Rsh is phOsphorc acid, calculated If IL were
free aud uncOmJined, and that every ton Of shorts
or middlings contains from 80 TO 30 pounds Of ash.
All the varieties Of bran are consequently well
fitted TO supply the phosphates needed by milch
cows and growing animals and the manure from
animals fed with bran WILL of course, be especially
rich in phosphates."
THE COMPOSITION OF AMERICAN WHEAT PRO-
DUCTs.-Important additions to our knowledge of
chemical composition and the Dutritive value of
some Of our common feeding materials for cattle
have been made by Prof. StoreT Of the }ussey Inst
. +.