EXHIBITION OF OBJECTS BELATING TO PIIABMACY. 
231 
fitted for the cellar or store-room. The diaphragm itself is very durable, is un¬ 
affected chemically and mechanically by most liquids, and able to endure exposure 
to any extent of humid heat. It has been proved by actual experience capable of 
preserving wine, beer, etc. for a very lengthened period, not only perfectly sound, but 
entirely unimpaired in flavour. There is attached to the diaphragm an elastic 
valve. This consists of a small piece of a stouter elastic membrane of suitable 
shape, so contrived that when distended by the pressure of the confined air or fluid, 
it becomes porous, and permits the passage through its substance of the super¬ 
abundant gas. This being effected, it resumes its normal condition, and prevents 
any further emission. Made in a detached form, this valve can be used without 
the diaphragm, and becomes a very superior description of the “porous peg” em¬ 
ployed by brewers. It may be easily inserted either in the bung or stave of a cask, 
or over a suitable opening in any other vessel; retaining as much of the products 
of fermentation as is desirable, and only parting with just so much as may be neces¬ 
sary or advisable, it will preserve the liquid in any state of briskness, which may be 
required. 
Casella, L. P., London. 
Mural standards of measure, having Metrical and English systems side by 
side. 
Clark, G-. E., manufacturer, Nottingham. 
Case containing elastic silk appliances, chiefly abdominal belts and stock¬ 
ings, chest protectors, trusses, and enema apparatus. 
Cliff and Co., Lambeth. 
Stoneware chemical apparatus, still, water filters, leech jars, infusion and 
extract pots, stone Woolfe’s bottles, stoneware taqis, and displacement 
apparatus. 
Deane, Henry, London. 
Displacement apparatus in copper and stoneware {vide Ph. J. vol. v. H.S. 
p. 544), new^ gas furnace for economizing heat in Pharmaceutical opera¬ 
tions, also a Chinese charcoal stove in biscuit-ware, used by the stall- 
keepers in the streets of Canton for boiling water for their tea. 
Doulton and Watts, Lambeth. 
Deane’s displacement apparatus in stoneware. 
Giles, E. W., Clifton. 
Arrangement for exhaustion of vegetable substances in a minimum of 
water. 
This apparatus was described by the inventor in a paper read before the Con¬ 
ference, and it is specially adapted for the manufacture of liquor cinchonte. 
Harvey and Eeynolds, Leeds. 
Model of mechanical apparatus for stirring liquids during evaporation, to 
be driven by steam or other convenient power. An ingenious form of 
stirrer is here exhibited, somewhat like the letter S. The stirrer itself is 
moveable and can be changed at pleasure. 
The inventor) read a short descriptive account of the apparatus, the chief merit 
of which consists in its agitating the liquid more freely than the ordinary shape. 
A portable galvanic machine (French) for medical purposes. The elements 
employed are zinc and carbon, which are excited by moistened persul¬ 
phate of mercury, giving a constant current. 
Haywood, J. S., and Sons, Castle Cate, Nottingham. 
Case of ebonite manufactures, comprising various forms of syringes, stetho¬ 
scopes, pessaries, ear trumpets, etc., to which this comparatively new 
material is applicable. 
Elastic bandages and stockings in silk and cotton. 
