234 , BEITISH PHAEMACEUTICAL CONFEEENCE. 
pcurs. On comprend done des a present 
que chaque fois que Ton voudra distiller 
ou evaporer nn liquide dans le but de 
ie concentrer, e’est FErorateur qui s’of- 
I'rira avec le plus d’avantage, realisant le 
double emploi. Avant d’entrer dans le 
detail des diiierentes pieces de FErora¬ 
teur, on peut se le figurer comme com¬ 
pose d’une bassine surmontee d’un cou- 
vercle. Tout le monde a pu A'oir que 
lorsqu’une bassine contenant de Feau, 
inunie d’un couvercle plus grand qu’elle, 
est sur le feu, il vient se reunir a la 
partie inferieure de ce couvercle, des 
gouttelettes qui tombent spontanement, 
autour et en dehors de la bassine, sur la 
plaque du fourneau.^ Telle a ete Fidce 
originale et vrjiie qui a servi de point 
de depart a FErorateur, aujourd’hui si 
perfectionne. Cesd^gouttelettes pren- 
nent leur origine de la vapeur, qui se 
condense a la partie inferieure du cou¬ 
vercle ; ce sont elles que FErorateur 
permet de recueillir sous forme d’eau 
distillee dans une rigole, situee dessous 
les bords de ce couvercle. Enfin, pour 
activer la condensation de la vapeur, au 
fur et a mesure de sa formation, on fait 
arrive!' un courant d’eau froide sur le 
couvercle. De la, distillation perma- 
nente d’une part sous le couvercle, et 
concentration d’autre part dans la bas¬ 
sine. 
A conyenient apparatus on the above principle, for the assay of wines. 
Model of a drying closet to be heated with gas. 
Sundry gas-furnaces for use with the apparatus above mentioned. 
An ingenious water-bath apparatus for spreading plasters. 
HoBBiNS AND Co., London. 
liegistered inhalers in porcelain, and Dr. Dichardson’s ana3sthetic spray 
producer. 
Sadlee, hr., Birmingham. 
Medical electrical apparatus. 
The ordinary form for the production of the galvanic current by means of horse¬ 
shoe magnet is shown in two modifications ; one similar to that introduced from 
America, the other contained in an upright box, more complete in its fittings and 
occupying less standing-room. The exhit)itor also sends two machines, compactly 
arranged, in which the old battery and coil principle is adopted. 
Savoet and Mooee, New Bond Street, Jjondon. 
Improved eye douche and ear douche; portable enema and injection ap¬ 
paratus. 
The novelty consists in the addition of an elastic india-rubber bag to hold the 
fluid to be injected,—the bag being attached to the supply-tube of the syringe by 
a metallic fitting with bayonet catch. 
Scott, Wentwoeth L. 
Apparatus for producing ammonia from air, and alcohol from olefiant gas. 
A little pure distilled water, to which a few drops of acid (preferably hydro- 
whenever it is desired to distill or evapo¬ 
rate a liquid in order to concentrate it, 
the Erorator may be used with most ad¬ 
vantage, as it serves the double purpose. 
Before describing in detail the compo¬ 
nent parts of the Erorator, it may bo 
considered as a pan v/ith a lid. Every 
one has noticed that when a pan con¬ 
taining water has a lid larger than itself, 
and is placed on the fire, little drops 
come together at the lower part of the 
lid, and fall spontaneously around and 
outside the pan on the stove plate. This 
was the true and original idea from 
which the present perfect Erorator was 
formed. These drops come from vapour 
which is condensed at the lower portion 
of the lid, and these are collected in the 
Erorator as distilled water, by means of a 
channel placed under the sides of the lid. 
Lastly, to increase the condensation of 
vapour in proportion as it is formed, a 
current of cold water is made to play ou 
the lid. Hence results on the one hand, 
permanent distillation under the lid, and 
on the other, concentration in the pan. 
“ Plaque du fourneau ” refers to the 
invariable closed stove with which the 
Ercnch work. 
