THE APPARENT POSITION OF THE ZODIACAL LIGHT. 



139 



No. of 

 Chart. 



259 



263 

 264 

 266 



Date. 



1854-1855. 



Nov. 28 



Dec. 19 



Dec. 

 Dec. 

 Dec. 



266 



Lat. 

 of 



Obs. 



38.0 



31.0 



268 

 269 

 273 



Dec. 26 

 Dec. 29 



26.0 

 1^3.3 

 17.4 



229 

 252 



Lat. of 

 Bound. 



27 -J 



282 



Dec. 30 

 Jan. 

 Jan. 18 



Jan. 



Jan. 22 



27 

 280 



16.0 

 11.6 



232 



19.8 



Jan. 23 



263 



12.8 



302 



Jan. 30 309 



Feb. 

 Feb. 



Mar. 

 Mar. 



333 

 338 

 339 

 354 



14.7 



Absorp- £"„ of 

 tion. 0- lia "- 



Pate. 

 1855. 



264 



250 



279 



29.1 I 264 



279 



52.5 

 40.8 

 89.2 



22.9 



280 

 292 



312 



323 



0.30 



0.07 



0.31 



0.08 



0.11 



0.05 



0.00 



0.03 



0.02 I 309 



0.00 



0.02 I 310 



0.06 



0.00 



0.07 . 



312 



Mar. IT 



Mar. 20 



Mar. 21 



Mar. 23 



Mar. 23 



Mar. lil 



Mar. 26 

 Mar. -J- 



Mar. 29 



Apr. 13 

 Apr. 14 



0.02 

 0.11 

 0.03 

 0.53 



0.04 



0.87 



0.14 I 322 Apr. 16 



0.23 I 324 Apr. 17 



0.40 



0.19 



0.05 



0.00 



358 



O 



.2.9 



22.9 





S2JQ 



22.9 



' 



00 



22.1 

 19.5 



18.1 

 21.0 



Lat of 



Bound. 



313 



THAT. 

 Absorp- 

 tion. 



;15 



331 » 



341 



Apr. 18 

 Apr. 19 



25.5 



28.0 



30.5 



:44 



0.02 

 0.00 



0.00 

 0.01 



0.00 



0.03 



0.00 



33.2 



0.00 



0J08 



O.oo 



O.HO 



COO 



0.00 



0.01 



0.1 Ml 



0.01 

 O.ol 



0.76 



0.70 



0.22 

 0.47 

 1.96 



n.43 



1.92 



0.47 

 1.56 



The 



differences of absorption corresponding to the evening observations of the 



"Stronger Light 

 collected in the 



the elongation 60° were likewise computed from the material 



prev 



communication above mentioned 



The longitude of the 

 point to which each observation relates was found from the longitude of the Sun. 

 The latitude of the axis, that is, the mean of the two latitudes given for the 



bound 



aries of the light 



was also computed for each ob 



The 



evening and the morning observations were then separately arranged 



groups, each covering ten degrees of longitude. When the observations formin & 



one of these groups had all been made under similar circumstances, and pre 

 sented a general resemblance to each other, it was practicable to employ thei: 



othe 



mean results in the subsequent discussion. But in 

 groups were combined to form new groups; no group 



P 



of adj 



was 



ade to 



de 



more than thirty degrees of longitud 



Tl 



mean results for all the 



group 



are 



giv 



Table II. Those derived from the morning obsen 



placed by themselves after the others 



shown 



the fir 



umn 



The 



