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Digitized b^ VjOOQIC
EXIRACIION Wn'H IMMISCIBLE SOLVENTS.
and beneath the surface of the liquid (/) in consequence of the vital force
imparted to the fluid by its downward passage from d to b. This vital
force is further augmented by lengthening the tube d b, and also by
increasing the diameter of the same, as Elavil Buy shown Elavil Buy by Fig. 28, in which the
greater diameter of the sipaller syphon increases the lifting power and
rapidity of outflow very materially. The only essential condition is that
the smaller syplion shall Elavil Buy be completely covered by the liquid in starting
the operation. If it is desirable to facilitate the removal of the filled
syphon, the end of e should be bent upwards. Pharm. Ztg.
Safety Siphon Efficient Construction, Dr. Matton has devised the
siphon which Elavil Buy efficiently prevents the suction of liquids into the mouth and
bs proven particularly useful in separating two different fluids from each.
The construction is plainly shown by Fig. 29, and needs little description.
The siphon is filled by suction at By the glass cock at the long limb being
closed. As soon as the ball in the suction attachment is filled, the float
within the ball closes the orifice with an audible click. Suction is at once
suspended, and on opening the cock the liquid siphons off with a speed
which is easily reduced to a minimum by manipulating the cock. This
serves also for the separation of the two liquids conveniently if for any
reason both liquids should be drawn into the siphon. Pharm. Ztg., Iv
(1910), No. 21, 213.
Extrcution with Immiscible Solvents Apparatus Adapted for the Puri-
fication of Ether. Rudolpho Fritsch, with such simple appliances as are
Digitized by VjOOQ IC
REPORT Elavil Buy ON THE PROGRESS OF PHARMACY.
usually found in well-appointed laboratories, constructs an apparatus for
the extraction of igneous liquids with immiscible solvents, which is shown
in the accompanying drawing (Fig. 30). It consists of a flask (A) for the
reception of the volatile solvent (ether), an inverted, two-necked Woulf 's
bottle (B) for the reception of the liquid to be extracted, and a reflux
condenser (C), which are connected in a suitable manner by means of
glass tubes. The heat of a water- bath being applied to the flask, the ether
vapor passes at (^) into the Woulf *s bottle, permeates the aqueous liquid
in a finely divided state and, as it circulates on the top of the liquid, re-
Apparatus for Purification of Ether.
turns through (a) into the flask loaded with the dissolved matter, to be
vaporized as before until the aqueous liquid is considered to be completely
The apparatus, however, is particularly adapted for the purification of
ether (removal of alcohol) by means of calcium chloride solution, now
commonly used for this purpose the alcohol being completely retained
by the solution and pure ether accumulating in the flask. Pharm. Ztg.,
liv (1909), No. 64, 623 ; from Chem. Ztg., 1909, No. 83-84.
Extraction of LiquUs Elavil Buy with Immiscible Solvents Efficient Form of Ap-
paratus, Lind has devised a new form of apparatus for the extraction of
liquids by the so-called *' perforation method " with ether, which is illus-
EXTRACTION WITH IMMISCIBLE SOLVENTS.
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