occ 
360 
OB S 
Tranf. 
— * Infcance to Mr. Hooke for communicating 
a contrivance of making, with a glafs of a 
fiphere of 20 or 40 feet diameter, a teiefcope, 
drawing feveral hundred feet ; and his offer 
of recompenfing that fecret with another, 
teaching to meafure, with a teiefcope, the 
diflances of objects upon the earth Auzout I 123 
~ — - A way for Myopes to ufe telefcopes with 
out eye-glaffes, an objeCLglafs alone be 
coming as ufeful to them, and fometimes more, 
than a combination of giaiTes Defaguliers XXX 1017 
Letters relating to a theorem of Mr. 
Euler for correcting the aberrations in th 
object -glaffes of refraCting telefcopes, by 
Short , Euler , and Dollond^G\SVll\ 287 
An account of fome new micro fcopes 
made at Naples, and their ufe in viewing the 
fmalleft objeCts - - Stiles LV 246 
« — A method of working the objeCLglaffes 
of refraCting telefcopes truly fpherical Short LIX 307 
— — See 'Telefcopes 
Observatory. Letter concerning the remains of 
the obfervatory of the famous Tycho Brahe 
G our don XXII 691 
The difference of longitude between the Royal 
Obfervatories of Greenwich and Paris, deter- 
mined by the obfervations of the tranfits of 
Mercury over the fun in 1 723, 1736, 1746, 
1753 - - Short LIII 158 
Defcription and ufe of a new-conhruCted equa 
torial or portable obfervatory - Nairne LXI 107 
A comparative table of the correfponding ob- 
fervations of the fir It fatellite, made in the 
principal obfervatories - Wargentin LXVII 162 
» ' » — ■ - An account of the Bramin’s obfervatory at Be- 
nares - - Barker — 398 
Obstruction. A method propofed to reflore the 
hearing, when injured from an obfbru&ion of 
the tuba euftachiana - Wathen XLIY 213 
Occult at ion. An occultation of Mars, and cer- 
tain fixed Hats, obferved at Dantzig, Sept. 1, 
1676, - - Hevelius XI 721 
— An obfervation cf Mars covered by the moon, 
Aug. 21, 1676, at Greenwich - Flamjlead — 723 
Halley < — 724 
> An account of an occultation of Venus by the 
Abridg. 
IV 188 
1 216 
1 350 
moos* 
