. An essay on contagious diseases : more particularly on the small-pox, measles, putrid, malignant, and pestilential fevers . ident from theWriters in Hydrofta- ^tics, that the Veffel CDEF B 62^ of Contagious Difeafes. C DEF will be preffed upon on everyPart of its Internal Surface equal to theBaGs of the Tube, by the Weight of aColumn of the contained Fluid of thefame Height with the Fluid, and whofeBafe is equal to that of the Tube, andconfequently every [nch Square on theInternal Surface of the Lungs will bepreffed upon by a Column of Air, whofeHeight is equal to that of the Atmof-phere, an
. An essay on contagious diseases : more particularly on the small-pox, measles, putrid, malignant, and pestilential fevers . ident from theWriters in Hydrofta- ^tics, that the Veffel CDEF B 62^ of Contagious Difeafes. C DEF will be preffed upon on everyPart of its Internal Surface equal to theBaGs of the Tube, by the Weight of aColumn of the contained Fluid of thefame Height with the Fluid, and whofeBafe is equal to that of the Tube, andconfequently every [nch Square on theInternal Surface of the Lungs will bepreffed upon by a Column of Air, whofeHeight is equal to that of the Atmof-phere, and bafe one Inch Square, whichwill amount to the aforefaid Sum. Vide Now if wefuppofe theTube X in-ferted intothe Neck ofthe Bladder Yand the Airforced intothe Bladder in Expiration, to an equal Denfity withthat of the incumbent Atmofphere, it isevident that the Air will not go oat bythe Tube without fomc external Force,being in MqulUbrh with the Atmof-phere, and confequently the Force byv?hich it is expreffed thro* the Tube,muft be that by which it exceeds thePreifure of the Atmofphere, upon theOrifice of the Tube«. If. Of Contagious Difeafes. 6^ If any one tbink that I have allowedtoo large a Quantity of Air to be takeninto the Lungs in an Ordinary Infpi-ration, That is fufficiently recompen-fed by foppofing the Diameter of theLarynx equal to and its Orifice is more than it can be, for theDiameter does not exceed , and confc-quently its Orifice will be but Nowit being demonftrated by the Writers inHydroftatics, that Weights forcing c-qual Qiiantities of the fame Fluid oatof the fame Orifice, are to each otheras the Squares of the Times in which theFluid is forced out, and that in equilTimes and Quantities of the fame tluidforced thro unequal Orifices, the weightsare F^eciprocally as the Orifices ^ ThePowers forcing an equal Quantity of Airthro the Orifices and muftbcto each other in a Reciprocal Proportion^compounded of the Squares of the Time
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Keywords: ., bookdecade1720, bookidessa, booksubjectfever, booksubjectsmallpox
