y^ 7 he Art of Farriery 



The Scat man Bodies) is the Seat of the Hip-Gout or Sciati- 



ot the Scia- ^a ; and in Horfes, no doub.t, there often happens 



Gouc.'"'^'* Pain in the Hip, which makes the Mufcular 



Fleili, on that Side, wafte and fall away. So that 



it is frequently miftaken for a Diflocation of the 



Hip-Bone. 



Refpiration Lajily, I fhall (as briefly as may be) iliew what 



or Breath- Refpiration is ; for, certainly there is an abfolute 



ing define a. |yj-g^,g^jjy ^^ underftanding how this is performed, 



otherwife, a Perfon can but have very dark Notions 



of the Animal CEconomy. 



Andyfr/f, it is obfervable, that by blowing into 

 a Bladder, a confiderable Weight may be raifed 

 'by the Force of our Breath. For with a Bladder 

 that is Oblong, nearly of a Cylinderical Figure, 

 and tied at both Ends, if a Pipe be fixed at one 

 End and a Weight at the other, and the Pipe 

 faftened at fuch a Diflance from the Ground, as 

 juft to allow the Weight to reft upon the Ground ; . 

 th€ Bladder by an eafy Infpiration, will raife half 

 a Stone Weight or feven Pounds, and by the greateft 

 Infpiration of a pretty ftrong Man, it will raife two 

 Stone or 28 Pounds Weight, 



Now the Force by which the Air enters this 

 Pipe, (which conveys it to the Lungs,) is that 

 fame Force by which it is driven out of the Lungs : 

 If therefore the Force by which the Air enters die 

 Pipe can be determined, we fhall have the Force' 

 by which the Air is drove into the Afpera Arteria 

 or Wind-Pipe. 



The PrrtTure of the Air upon the Bladder, is 

 equal to twice the Weight it can raife; becaufe 

 the upper Part of the Bladder being fixed, it 

 refifts- the Force of the Air, juft as muft as the 

 Weight at the other End. And again, fince the 11 

 Air preftes every way equally, the whole Pref-' 

 fure will be, to that Part of it which prefies up- 

 on the Orifice of the Pipe, as the whole Surface 

 of the Bladder is to the Orifice cf the Pipe: 

 Tiiat is, as the Surface of a Cylin...:-, vvhofe Dia-' 



meter. 



