Green, observation of Mars, [280]
Greenwich observations, [3],[ 27],[ 32]
Gregory, David, achromatic lenses, 112 note
Gregory, James, double star method of parallaxes,[ 16];
reflecting telescopes, [109]
Groombridge, star catalogue,[ 31]
Grosch, corona of 1867 [176]
Grubb, Sir Howard, photographic reflector, [409];
great refractors, [430] [433]
siderostat, [437]
Grubb, Thomas, Melbourne reflector, 110 note, [428]
Gruithuisen, snow-caps of Venus, [255];
lunar inhabitants, [265]
Gully, detection of Nova Andromedæ, [394]