444 MEM O IR S of the 
if the elafticity of the air in the fame fpace be as its quantity, the 
refidance or preflure under the glafs will be to the preflure upon 
the circumjacent parts, as one to a thoufand 5 bccaufe, before the 
air was cxhauflcd out of the glals, the reiiftance or prefTure under 
the glais was the fame with that upon the parts without the glafs : 
Mr. Zuffkin takes it to be worth obferving, that by how much 
greater the cylinder is, than the fpring, fo much greater will the 
quantity of air be, that is exhaufted out of the glafs 5 becaufe the 
air p, o, 9 is expanded into a greater Ipace, and confequently has 
a lefs elallicity ^ wherefore the elafticity of the air in the glafs 
has a greater ratio to the elafticity of the air contained in the 
cylinder and fpring, and for that reafon a greater quantity of air 
will be exhaufted out of the glafs. 
^ivo monflrous Pigs and a monftrous double Turkey 5 by Sir 
John Floyer. Phil. Tranf Isl° 259. p. 431. 
TH A T the diflortion of the parts of a Foetus may occafion 
its reprefenting the figure of different animals, without 
any real coition betwixt the two fpecies, appears by the defcrip- 
tion of the following monfters : There was fliewed Sir jfohn a 
pig at Weedford in Staffordpire^ with a face fomewhat refem- 
bling that of a man 3 the chin was very like that of a human Jte- 
tm 5 the roundnels of the head, and flatnefs of the ears was fur- 
prifing 5 but upon carefully viewing the head, Sir John obferved 
there was a depreffion of the bones of the nofe; in that place 
which was betwixt the eyes, in which the pig's face feemed to be 
broken, and the nofe drawn up, to appear like human 5 the 
under-jaw was inverted, growing up to meet the upper; the 
tongue and mouth were more like the human, being altered by 
fome external prefTure upon the pigs mouth, which broke the 
bones of the noie, and caufed their depreffion towards the palate, 
and the inverfion of the under-jaw 5 this prefTure upon the mouth 
forced the bones npwards, fb as to cover the orbits of the eye and 
the pig appeared blind : The depreffed bone fhut iticlf with 
a fpring when forcibly opened, fo that it had been clofed up, 
ever finceit was cartilaginous- by this breach or depreffion of the 
pigs face. Sir John was firft convinced that this monfler was not 
produced by the copulation of two fpecies, but only occafioned by 
lorne coroprcffion or other; and that the pig's head was ftraitened 
in its growth, appeared by the fiatnefs of the ears; and that this 
depreffion happened, whilfl the bones were cartilaginous, ap- 
peared by the depreifed bones remaining cartilaginous, and at the 
l*me time the under-jaw was inverted and the head became more 
round , 
