New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1875-12-25

upon sample Oi gum copa ana Dut gcnIly "hihc"'
| will dissolve that gun completely. 1t is also al
excellent rcagent for Distinguishing true amber from
its imitation lii copal.
WATERPROOF DRESSING FOR LEATHER-A dress
ing for rendering leather waterproof, made as fol-
lows, as proposed by Hager, has been found TO
answer the purpose Dissolve part of ndia-rubber
in parts of illuminating petroleum, by digestion
for day. and add 30 parts Of parailine to the pasy
mas and digest again for half day, win re-
peated stirring and then mix u with iIe patts Oh
oil and of taIow and finally add 10 of petroleum,
enough to give tine mass the CONSISTENCY Oh Dlser'
| AUTUMN PLANTING OF PorATOEs.-Experiment
have been conducted in Paris with reference to
method Of Autumn planting Of potatoes, by which
new potatoes may be dug in January The sets are
planted in August Oh a thin layer Of salt, which
appears 10 be the special secret in the process, and
! the potatocs are earthcd in September the ground
being cleared of weeds in Octobcr. The result IA
CROP of eight iar-szej tubers to each FOOT
| in January.
Ou-PNNr FOR FL0oEs-None but earth-colors
should be used in painting floors, and the rapid
wearing of Of a coating of Oil-paint on floor Is
sure indication thil white lead has been mixed with
| the paint This is generally the cas-" since il causes
| the paint to cover better and spread easier Even
| fhc employment of yarnish thai has been boiled
with litharge should be avoided, ana enc Dol ii WIN
| boratc Of minganesc, preferred ~ ~ aiSo very
| important that the first coating should be per-
! fect.y dry before a second - LAID ON.
! IMITATION OF JACJBsEN's COPYLSG-fNK PENCILS.
limitations OF jacobs M substitute for ink, in the
form of copyilgia!, pencils have made their appear
| ance They consist essentially Of tn same ingred
ent, as the original, namely graphite aud anilne
color bit are consolidated simply 10y means Of traga
canth or other lnuciag,. iustoal o. by the pecuir
process by which TIN go npact, h)mpgcneous bieS or
The original Is formed. The imitation Is, therefore,
| r.atff la Iisi lsf I
brittle is never pointed, end - generally careessly
finished. The pencils also absorb moisture from the
| air, and s0Ol Decon" soft AM sGedrJ.
| BROMIDE or POTASSIUM FOR IlfApACHE.-The
form of headache termed by the French mirahe Is
often periodical in its nature and Is always at inst
hcmicrauil,; then often accompanied 10y a peculiar
sense of heayness Of OF the eyes or even one OF
the orbits II at TINS ue before the actual parox-
,s,,, has come on LARGE doses OF bronIde of pDtas-
| siun be administered great RELIEF viii IN many
! eases be- produced The bromide dissolved IN water
should be administer. in doses oi from - T. 100
grains fox adult male, % IJr female, ana - l9r
| a child 10 Dc swallowed by successive moutAfals
within a quarter Of an hour Or 70 minutes
Bou,Crc ACrp.-At a meeting Of the Chemical So
cieiy ,lr. Howard said ihat boracic acid destroyed
vegetable growth-grass for nstance-with a yisoc
and pcrmanence which. il il fertilizer would
render il Invaluable. Mr. A. Since, j., had found
that # 1 part of 10 per ceHt solution Of DOra,ic
| acid were added to parts of milk If would keep II
sweet for a week. d.. j. i.dmons, in complicated
ol ampu,atiJn Of The tiiIs had eino, ed diSs'-
ings Of lint STEPPED IN hot saturated solution OF b0-
raec acid with the most ~tIctOry results IN pre-
| venting the putIci3ctlyc d.Sclargo. TIE baHdagps
couid remain for 30 or Is hours without the slight
| est pUtfcfaCu'e odJr.
| VALUE or THE Common Boom PLANT AS 4
FlBER.-The common broom of Europe lSpdriimm
| juacata,) is announced furnishing fiber equal.
| and in respects SUPERIOR 10 that OF hemp and
lax. In view Of the grra extent 90 which this plant
occurs wild in Southern Europe, and the ease with
which it is cultivated, such application, not indeed
| new but only more recently revived promises i'm
portant results. It's fiber can 10 very minutely
! divided and as il retains heat, it can supply the
place Of wool. IL receives the most delicate dyes
we'll animal finer, and successfully ressts the
| action of acids aud salt water without undergoing
| any change or losing IFS tcnacty It's strength Is
one-thirl greater than that Of hemp, while it is IL
| per cent lighter. Ii be furnished, delivered AZ
the factories, for about e. per ton. The fiber may
| be obtained by soaking the stems Tor lew days IN
warm water, else 10y means OF chemical solution
of little cost.
| VARIATIONS ~ PLANTS WITH THE ALTITUDE At
| WHICH THEY GROw.-Aecording to Ebemeyer, the
size Of leaves Of a given species Of tree is cOnsdera
bly, affected by it's hight above the level; with
equal strength of soil the leaves decreasing with the
hight I'm the case of the red beech of Germany the
surface OF the ltaFfs on low ahls ~ iFet 10 lOuI
times greater than on the mountains. As general
rule the quantity of hunus in mountain forests is
greater than in those lower down, owing to the
slower decay Of The leaves consequent upon lower
| temperature. 10 u gwen ~ remarkable fact by
EbeTmeyer that the entire amount of ashes Of the
| strewu materials decreases with the hight, and
that the proportion Of phOsphoric acid, especially
in the ashes, much less IN ngl positions than
lower ground. Hence il follows that the value OF
the dead leaves ~ manure decreases general win
the hight, and that consequently the carrying away
II material from the low lands for other purposes.
ia much more oisadyantageIus than from the noun
tains, 4 FAR as plant nutrition IL concerned.
| EXACT OBSERVATIONS OF NEBULF.-Dr Schultz
of Upsala has during the past ten years devoted
great deal of attention to the observation OF Jui,
having special reference TO the determination of
thcr precise positions and motions. The results of
| his observations have been published as n catalogue
of 800 nobulic the whole number of single measures
amounting to 1900, number which is large
enough to assure Us OF his great devotion to the
work. The heavens at Upsaa rarely free from
clouds for any length of time, and the long twilights
| of Summer, the regular recurrence of bright moon
! lights, and the frequent brilliant auroIe, have all
| combined to leave him but 4Oi working nights Tor
night in ten in the Of IL years. that could
be utilized Tor his delicate measurements The large
| number OF noticed by him will be an inn
pOrant minor result of hls persistent labOrs. The
| EEL .scope employed by DIR. Schultz was of l3 feet
! focal length, whence We may gather that similar
! desirable work ~ fully within reach of a number
of telescopes in the United States that are believed
| IT, be at present idle.
| APPARATINE, A NEW ASrI-iNCRUsrAToR.-A new
! ant-ncrusatOr has lately been introduced under
the name of apparatine. which is prepared by stir
| ring up 16 parts of potato starch in 7G parts of
| water, and then adding parts Of potash or soda
| lyc, at $50 Baum6, the whole to be thoroughly
| mixed together In short time the mixture forms
thick jelly, aud 1t is then beaten up vigorously for
tme when it forms u colorless, transparent sub