442 M E M O I R S of the 
the carncous membrane incumbent on the gullet, but alfo out 
of the fubftance of the cartilages themfelves, both on the up- 
per and lower parts of the divided 'Trachea -^ the external, con- 
taining parrs of the neck, began now to unite, new fiefh ari- 
iing, and apparently lelTening the dimenfions of the wound, 
every time there was a laceration of the Hitches, infomuch 
that two needles were now fufficient, whereas at firft there 
were ufcd no lefs than fix 5 thefe carneous portions, both of 
the Trachea and exterior parts, gradually joining and inter- 
mixing, became one folid Cicatrix from each end of the wound, 
almoft to the middle of the wind-pipe, where the air conti- 
nued Itill in lome degree to have an exit^ about the 15th day 
the furgeon removed feveral pieces of bone, which had con- 
tra(5ted a Caries in the cartilage, which in this old man, as in 
ieveral others, was grown bony, and were expelled by the 
new flefh : At this time he fwallowed with little trouble, eat 
fufficiently, and was nouriflied in proportion 5 the aperture 
was almoft clofed up about the z6th day, and in four or five 
days more, the (ides of the wound were perfe(^ly joined and 
cicatrifcd, the Trachea performing its part in refpiration as at 
other times, without any confiderable irconveniency 5 he after- 
wards fpoke indifferently well, but was forced to take care 
when he fwallowed, the Rimula not being fliut exaftly, as it 
was before this wound, which makes fluids of any fort more 
apt to fall into the canal, and fo caufe a cough, hoarfnels, ^c. 
He did not fwallow dry meats as eafily as he did before but 
was in all other refpefts as well as ever. 
The Pneumatical-Engine applied to Cupping-Glaffes hy Mr. 
Tho. Luffkin. Phil. Tranf. N° 255^. p. 40S. Tranflatei 
from the Latin. 
LET A B Plate XIII. Fig. i. be a concave cylinder of 
brafs, of a proper thicknefs, an inch in diameter, and ten 
or twelve inches long, to be fo exquifitely polifhed on the 
infide, as not to have the leaf! flaw or inequality 5 let there 
be a fmall bore near the bottom as O, and a cover or lid as 
EF Fig. 2. to be fixed on the cylinder by two fcrews^ a bot- 
tom as GH Fig. 3 to be foldered to the' cylinder ; let that 
end of the fyringe i 2, be perforated in the middle, to the 
outfide of the bottom j let the iron rod N N, Fig. 4 of a pro- 
per thicknels, be fitted to the length of the cylinder ^ at its 
extremity let there be a plate of brafs L M, and about two 
inches from the t(>p another plate IK5 the intermediate fpace 
is to be filled up with threads moiftened in oil, fo as to Jhut 
cxavtiy 
