New-York tribune., 1872-08-01
SCIENTIFIC NOTES.

GYPSUM As A CEMENT.-F. Schott has dis-
covered that plaster Of paris anhydrous supha'e OF
lime when heated TO 5000 Cent, acquires true yi ~
properties and. when mixed with que quSo' 49, cot
water will at the expiration Of about tiSS u! " Wv
into a white semi transparent mass of great DeauN'
A New BLUE.-TO metallic antlmohy' uis,
solved In aqua regia and filtered through kr"n'n"'oo
glass; add solution of prussiste OF potash ~ O" "
any precipitate is formed thus beautiful anu @ IN
rant elne color A. produced which can scaroeiy oo u
tingnsbed from utramarine. With chrome OF znS !oI
low, it yields green which is almost egS III 'O''i "
Hehweinfurth green. and Is far less polsoho"s'
IsCoMBUsTIBLE CoATINGs CLoTH'-lu ungs-
tate OF soda has been successfully used for rendering
o,o, clotb and other fabrics reproof. Pestera reoou
xnenas cheaper mixture for the same purpose III con-
tsts OF four parts OF and three parts OF suna
az marnesa TO be mixed first before being needed anu
dsso' ee IN ~ 10 a tbis solution Immediately then
wrlnc out aud dried. Another eiheieut mixture ioi i
SerinS fabrics nOn-inHammabe, recently patense9 IN IN
nnne,sfs Of eoual weights OF acetate or lime
AND chloride OF calcium, dissolved IN l"loe 'N'
Of hot water =, ~
NEW Use FOR ANILINE C0LoRs'-hr' r.
sprncniihl recommends, German Journal the use
Al alcoholc solutions of various gums, for example
shellac and sandarac TO which various anine colors
have been added for the purpose Of eoorng all Khus
of paper leather linen, and other fabrics Ihe opera
tion consists IN placing d e tbroncb II The sn6
stance to be eOlOred which, after being hung up ana
STd NAV receive another color on side II desired
si The substance NAV az the same time be perfumed
Any desired may be produced by judicou5y mixing
several Of the lacs.
To OBTAIN WATER FROM GREAT DEPrHs'-
An apparatus has been recently devised IN Germany foI
obtaining specimens of water at desired depth Oi the
ocean A strong heavy vessel, entirely closed aud
empty has valve through which water may be ad
nsitted but which is only put in motion by means OF
powerful electrO-magnets connected thereWtn luese
magnets also connected with wire when sgooii
panies the rope by means OF which the apparatus
lowered from the ship. When the empty Nesst Nlcn
81 IN fact plummet has reached the required uepth
current Of electricity il sent from the battery on s
the coils below; the magnetism thns gehcIdtSu
opens the valves and the vessel cd ana reduS " NC
drawn up.
Poisonous EXHALATIONS OF IREES-u Mar
stems, in "a communication 10 a German Journal On
the influence Of the socsed Poisonous Shadows
states that during long residence in tropical America
he became well acquainted with the euphor6aceous
tree Hippomane Manzanilla L., and with the tact 'n
the natives considered il poisonous as TO aVod gong
near H. asserting merely resting under its deeI
ible persons death. The poisonous lnhdehce OF @
tree having been denied by various uauraisS esPcSi
ally Joaquin the author gathered some OF the Juoe on Vi,
sea-coast OF Venezuela near Laguayr In snort u' m
he seized with sensation OF neat ana sWtIhg az
over his body, especially about the race, Inc IL
he unable TO open MS eyes, ana n
faton was SO great as force him 10 pass scNtl udy
of great pain IN dark room. On the tblru u1E ~ ~
swelling began diminish and the cucle 70 scae on
atmosphere, evapOrates from the moist oaIh
and acts Hrtant poison 70 INC sAtL ~
and mucous membrane II Is stated by Joaquin tni t
remained many hours IN close proximity 70 1hia g
without injury, bur during storm, ana dOuDtess
the wind and water carried OIL the noAlOus NapOI
Karstens believes that the poisonous pruce
from this species spurge nTOgenOus ana prOOaV
is a substitution product Of ammonia analogous u
trimethy laInine