288 



Dr Brewster on some Affections of the Retina. 



No. 



Star's Name. 



162 Piazzi XIII. 25 



163 H. C. 506 



164 £ Ursa: Maj. 



165 V. 128 



166 H. C. 335 ? 

 16/81 Virginis 

 168 H. C. 335 ? 

 109 » Boolis 

 170 H. C. 162 



1 17 r Virginis 



172 82 of the 145 



173 08 of the 145 



174 k Bootis 



175; Bootis 



176 Piazzi XIV. 62 



177 H. C. 334 



178 H. C. 470 

 170£ Turdi Sol 



180 H. C. 165 



181 ir Bootis 



1 82 f Bootis 



183 It 82 



184 73 Hydra; 



185 s Bootis 



186* Libra; 

 187 ^Bootis 



188 39 Bootis 



189 Bootis 346 



190 28 of the 145 



R. A 



h. m 

 13 6 



13 1 



13 13 



13 21 

 13 2fi 

 13 

 13 41 

 13 4( 

 13 40 

 13 52 



13 54 

 14 



14 7 



14 10 

 14 13 

 14 14 

 14 15 

 14 15 

 14 : 

 14 32 

 14 33 

 14 30 

 11 31. 

 14 37 



14 41 

 14 43 



14 44 



14 55 

 14 48 



Decl. 



10 24 S 

 3 38 N 



52 N 



46 S 

 10 N 



57 S 



52 N 

 19 N 

 43 N 



26 N 

 17 N 

 14 N 



39 N 



12 N 



56 S 



16 N 



3N 



8S 



6 N 



12 N 



31 N 



27 N 



40 S 

 51 N 



Angle of 

 Position. 



15 15 S 

 19 51 N 



19 27 N 



48 2 N 



20 35 S 



28 21 

 13 39 



57 40 

 II 13 



24 51 

 47 16 



70 25 



29 27 



58 28 

 19 57 



71 43 

 79 30 

 31 15 



50 36 

 77 6 

 83 24 

 65 17 



25 49 

 7 30 

 7 53 



36 58 

 4 27 

 46 40 

 52 59 

 Ep. 1822.55 

 44 33 

 70 54 



45 55 



63 53 

 9 



Qua- 

 drant. 



S "f 

 (. S J> 



•I/ - 

 »/ 

 "f 

 'If 



«r 



if 

 up 

 up 



"P 



»f 



up 

 sp 

 up 

 up 



£ 



■if 

 lip 



lip 



lip 



■if 



np 



Distance. 



44.347 



28.465 



14.455 



47.720 



9.613 



4.020 



5.664 



6.203 



7. 780 



19.290 



21.392 



6.049 



13.130 



38 047 



5.880 



7.185 



10.192 



35.121 



25 781 



6.889 



1.683 



7.335 



0.995 



3.931 



Ep. 1022. 55 



3 50-053 



8.006 



Ep. 1822 03 



4.626 



30.544 

 10.833 



Remarks. 



Unchanged. 

 Distance increased. 



Pos. changed — 6" 4'. 



Position blightly chang- 

 ed. 

 Very little changed. 



Unchanged. 



Unchanged in Position. 

 Changed 0' 25' in Pos. 

 Binary. Mean mot 

 + 0°.4378 



Greatly changed, perhaps 

 by proper motion both 

 in Angle and Distance. 



Probably changed in Pos, 



Our obs. rather dubious. 



Unchanged. 



(To be continued.) 



Art. XV. — On some Remarkable Affections of the Retina, 

 as exhibited in its insensibility to indirect Impressions, and 

 to the Impressions of attenuated Light.* By David Brew- 

 ster, LL.D. F. R. S. Lond., and Sec. R. S. Edin. 



Amokg the various phenomena of vision which were observed 

 by the philosophers of the last century, those which arise from 



* This paper formed the third section of a Memoir On the Structure and 

 Functions of the Human Eye, which was read before the Royal Society of 

 Edinburgh on the 2d December 1822. 



