A XI 
BAL 
ritrochio, faid to be void of fri&ion ; with an 
experiment to confirm the reafoning made upon 
an axis in Peritrochio, hrft ufed in M. Per 
rault’s manner, then in the common way 
- Defaguliers 
A farther examination of the above Defaguliers 
An enquiry concerning the figure of fuch pla- 
nets as revolve about an axis, fuppofing the 
denfity continually to vary from the center to 
the fur face - - Clair ault 
Two letters concerning the rotatory motion of 
glafs tubes about their axes, when placed in a 
certain manner before the fire Wheeler 
Efifay on the preceffion of the equinoxes and the 
nutation of the earth’s axis Walmejley 
A theory of the irregularities that may be oc- 
cafioned in the annual motion of the earth, by 
the actions of Jupiter and Saturn Walmejley 
Azimuth. The ufe of a new azimuth compafs for 
finding the variation of the compafs, or mag- 
netic needle, at tea, with greater eafe and ex- 
a&nefs than by any yet calculated for that pur- 
pofe - - Middleton 
Azimuth Compass, See Gompofu 
B, 
BACK, A cafe of an extraordinary exofcofis on the 
back of a boy - Freke 
Back-Bone. An account of a fione 'fattened to the 
back-bone of a bode Gorneds de Letterati 
Bagford* An e flay on the invention of printing by 
John Bagford ; with an account of his codec- 
' tior.s for the fame - Wanley 
Bahama. Account of a poifunous fifh in one of the 
Bahama 1 {lands - - Locke 
Balances, An invention for efiimrtting the weight 
of water in water, by ordinary balances and 
weights - - Boyk 
—— A propoiition on the balance, not taken notice 
of by mechanical writers, explained and con- 
firmed by an experiment Defaguliers 
An account of an experiment explaining a me- 
chanical paradox, viz. that two bodies. of equal 
weight, fufpended on a certain fort of balance, 
do not iofe their equilibrium, by being re- 
Tranf. 
XXXVI 222 
— - 228 
XL 277 
XLIIX 342 
XLXX 704 
— 737 
XL 39| 
XL! 369 
IX a S3 
VII 4094 
III 164 
XXV 2397 
V2 18 
X 312 
II 842 
IV ICO! 
I 520 
XXXVI 128 
Abridg, 
Vl^iy 
— 3 2 o 
VIII 90 
x 55 1 
VIII 374 
moved 
