364 OPT ORA 
—— An obfervation of optick glaffes made of 
rock-cryilal - - Divini 
„ , — . — An account of the invention of grinding 
optic and burning glaffes of a figure not 
fpherical - •* Smethwick 
— A letter concerning an optical experiment; 
conducive to a decayed fight - Anon % 
Another, confirming the former, and adding 
fome other obfervations about fight Anon. 
A note relating to the above Anon. 
Another note on the lame, about the final 1 
empty tubes - - Anon. 
— A contrivance to make the picture of any thing 
appear on a wall, cup-board, or within a pic- 
ture-frame, Ac. in the midft of a light room 
Hooke 
— — Letters about an optic problem of Alhazen 
S'ufius, Hu genius 
Continuation of the letters Slujius , Hugenius 
Some optical affertions concerning the rain- 
bow - - Linus 
— An infiance of the excellence of the modern 
dern algebra in the refolution of the problem 
of finding the foci of optic glaffes univerlally 
Halley 
— An account of an optical experiment made be- 
fore the Royal Society - Defaguliers 
» Experiments made in Augufi, 1728, before the 
Royal Society upon occafion of Signor Riz- 
zetti’s opticks with an account of that book 
Defaguliers 
— — An obfervation made in opticks Edwards 
See Light and Colours . 
Optic Nerve. Microfcopical obfervations con- 
cerning the optic nerve - Leeuwenhoek 
— - Obfervations on the cryftalline humours, 
optic nerves, Ac. - Leeuwenhoek 
Opuntia. The efre£fs of the opuntia, or prickly- 
pear, and of the indigo plant, in colouring 
the juices of living animals - Baker 
Orang-outang. Account of the organs of fpeech 
of the Orang-outang - Camper 
Oranges. Some hortulan communications about 
the curious engrafting of oranges and lemons, 
or citrons, upon one another’s trees, and of 
one individual fruit, half orange and half 
lemon, growing on fuch trees - Anon. 
Tranf. 
I 362 
III 631 
— 7 2 7 
— 729 
— 765 
— 802 
— 74 1 
VIII 6119 
— 6140 
X386 
XVII 960 
XXXII 206 
XXXV 607 
LIU 229 
X 378 
XVII 949 
L 296 
LXIX 139 
11 553 
Abridg. 
1 195 
— 194 
11141 
11 864 
1 206 
— 172 
— 174 
II 290 
1 315 
— 183 
VI 145 
— no 
III 683 
— 685 
II 568 
A 
