( 4T? > 
pofed in Books and chirurgical Leflures: For we found 
that upon cutting the Parts, efpecially the Thyroid 
Gland (which is not fo much minded in moftof the 
common Defcriptions of this Operation as (hould be) 
foon become fo much tumificd, that it will require a 
Pipe above an Inch long, to penetrate fufficiently into 
the Jfpra Jrteria. Which is more than double of 
Garangeofs Allowance of fix Lines ^ who is one of the 
recenteft Writers, and has communicated to us all the 
Surgery the French are Mailers of. The Leaden 
Pipe we had prepared not anfwering the Defign, that 
which we made ufe of was too long and too fmall, 
being the common Cannula for tapping in the Dropfy, 
flatned a little at the End, and hindered by a very 
thick Comprefs, perforated in the Middle, from pene- 
trating too deep into the Trachea, ^ 
The mucous Particles and Steams arifing from the 
Lungs, made a conftant weeping of a thin fla very Li- 
quor from the Mouth of the Pipe, part whereof thick- 
ening, and fluffing its Cavity, fometimes very muchm^ 
commoded the Patient’s Refpiration by it, fo as to ren- 
der it neceffary to have it taken out and cleaned. And 
hence, when fome Moderns very precifely bid us put 
a thin Slice of Spunge, or a bit of Muflin, Sf c. clofe 
over the Orifice of the Cannula, to prevent the Ingrefs of 
Dufl, Downs, or the like, into the Lungs, it confirms 
what I faid before of the Unufualnefs of the Operation, 
and looks as if they had only contemplated the Matter 
in Jhjraeto^ as the Met aphyjf dans fay, without con- 
fidering they had not to do with a pure thin dry Air, 
but with a heterogeneous Fluid, that is moiflened and 
thickened with vifeid Particles, which are apt to run 
together in fliff Concretions. And therefore, though 
^ P n n It 
