_Ocean_, what Seas may be joined with it, 3. 41.
_Opticks_, Campani's Glasses do excell Divini's; 'tis easie by them to
distinguish people at four Leagues distance, 2. 131. and 12. 209.
What they discover in _Jupiter_ and _Saturn_, 1. 1. and 2.
The proportions of Apertures in Perspectives reduced to a Table by M.
_Auzout_, 4. 55.
Animadverted upon by M. _Hook_, 4. 69.
How to illuminate Objects to whatsoever proportion, proposed by M.
_Auzout_, 4. 75.
_Hevelius_, _Hugenius_, and some in _England_, endeavour to improve
Optick Glasses, 6. 98.
Seigneur _Burattini_'s advance in the same inquired after, 19. 348.
some answer to it from _Paris_, 22. 374.
_Divini_ makes good Optick Glasses of Rock-chrystal, that had veins (_if
he mistook not somewhat else for veins_) 20. 362.
To measure the distance of Objects on earth by a Telescope, undertaken by
M. _Auzout_, and others of the _Royal Society_, 7. 123.
How a Telescope of a few feet in Diameter may draw some hundreds of feet,
7. 127.
How a Glass of a small convex-sphere may be made to reflect the Rayes of
Light to a _Focus_ at a far greater distance than is usual, 12. 202.