The family physician, and guide to health : in three parts ... Together with the history, causes, symptoms and treatment of the Asiatic cholera: a glossary explaining the most difficult words that occur in medical science, and a copious index; to which is added an appendix / By Daniel H. Whitney.

Whitney, Daniel H.

Date:: 1833

Credit: The family physician, and guide to health : in three parts ... Together with the history, causes, symptoms and treatment of the Asiatic cholera: a glossary explaining the most difficult words that occur in medical science, and a copious index; to which is added an appendix / By Daniel H. Whitney. Source: Wellcome Collection.

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$\ = 508 Spy sbhossaRy, OR small excavation, shaped like fluid heavier than air.’ For a funnel, which is formed in|that purpose, take a wide- the lower part of the sheif.} mouthed bell-glass, or-receiv- This trough is filled. with wa-!er ; plunge it under the wa- ter sufficient to cover the te ter in the trough in order to to the height of an inch. fill it; then raise it with the The use of this shelf is to] mouth downwards, and place support receivers, jars, or bell-| it on the shelf of the trough, glasses, which, being baie So.as to cover one or more Sof ously filled with water, are | the holes in it., placed invertedly, their open} It will now be full. of wa- cnd turned down upon the} ter, and continue so as long as _aboye mentioned holes, thro?| the motith remains below the which the. gases,conveyed! surface of the fluid in the cis- there and directed by. means tern ; for, in this case, the wa- of the funnel-shaped excavas| ter is ‘sustained in the vessel tions, rise inthe form.of air- by the pressure of the atmos- bubbles into the'receiver. f phere, in the same manner as When the gaseous fluids are |the mercury is sustained ‘in capable of being absorbed by |the barometer. It may with- water, asis the case with /out difficulty-be imagined, that some of them, the trough must !if common air (or any other be filled .with mercury. «The j fluid resembling common air price and gravity of this fluid | in lightness and ‘elasticity,) be make it an object.of conven- {suffered to enter the inverted ience and ‘economy, that the {vessel filled with water, it trough should be smaller than j will rise to the upper part, on when water is used. lacoount of its levity, and the A mercurial trough is best’ isurface of the water will’sub- cut in marble, free- stone; ora side. To exemplify this, take solid block of Sica A trou ch ja glass, or any other vessel, in about twelve inches long, three |that. state. which: is usually inches wide, and four. deep; | call empty, and plunge it inte is sufficient for all private-ex- | the water with itsmouthdown- - periments. _ | ‘| wards; scarce any of ‘it will Method of collecting gas-: enter the elass, because its en- from one vessel to another. . \ticity of the included air ; but If we are desirous of trans-lif the vessel be turned. with mitting air from one vessel to | its mouth upwards, it immedi- another, it.:is necessary that|ately fills, and the air rises in the vessel destined: to receive | bubbles to the surface. ff Bins “fF$