A I R 
tudes and weights in common air, from the 
Tranf. 
Abrxdg. 
fame height - - Haukfiee 
» — ■■ Barometrical experiments for difeovering the 
various elafticity of the air in different parts of 
xxvir 195 
IV 2, 182 
Switzerland - Scheuehzer 
An account of fome experiments made on the 
27th of April, 1719, to find how much the 
refiftance of the air retards falling bodies 
XXIX 266 
IV 2)6 
Defaguliers 
XXX 1071 
IV 2 175 
Further experiments - Defaguliers 
— An account of fcveral experiments concerning 
the running of water in pipes, as it is retarded 
by friction and intermediate air, with a deferip- 
tion of a new machine, whereby pipes may be 
cleared of air, as the water runs along, without 
— 1075 
— - 178 
hand-pipes, or the help of any hand Defaguliers 
XXXIV 77 
VI 347 
. — An attempt made to fliew how damps or 
foul air may be drawn out of any fort of 
mines, &c. by an engine - Defaguliers 
— An account of an inftrument or machine foi 
changing the air of the room of fick people 
in a little time, by either drawing out the foul 
air, or forcing in frefh air ; or doing both fuc- 
cefiively, without opening doors or windows 
XXXV 353 
VI 2 193 
- Defaguliers 
A calculation of the velocity of the air moved 
N by a new-invented centrifugal bellows of 7 feet 
in diameter, and 1 foot thick within, which 2 
man can keep in motion with very little labour, 
at the rate of two revolutions in one fecond 
XXXIX 41 
VIII 270 
- - Defaguliers 
XXXIX 44 
VIII 271 
The ufes of the foregoing machine 
An account of an invention and method of 
changing the air in the hold, and other clofe 
— 47 
— 273 
parts of a fhip - Sutton 
XLII 42 
— 628 
— — Obfervations upon Mr. Sutton’s invention to 
extraCt foul and {linking air out of fnips, with 
critical remarks upon the ufe of windfalls 
- Wat fan 
— — An account of the great benefit of blowing 
mowers of frefh air up through diflilling li- 
quors - - Hales 
- Thoughts on Dr. Hales’s new method of dril- 
XLII 62 
XL 1 V 312 
— 630 
ling by the force of air and fire Brownrigg 
XLIX 534 
Air ( Electricity of the). Obfervations upon the 
electricity of the air, made at the Chateau de 
B 
Main- 
