244 



OBSERVATIONS ON THE ZODIACAL LIGHT, 



No. 122. 



FEBRUARY 23<I, 1854: EVENING. 



Lat. 35 19' N. : Lon. 139 43' E. 

 Sun set 5A. 4. r >m. 



Stronger Light, 7A. 8m., &c. > .,,. , , n , , on 



to 8 30 > Diffuse, ,k. 10m. and 8A. 30rn. 



Cloiids last evening. This evening blowing a gale, (thermometer 37, and at 3 a. m. at 32 Fahrenheit.) but the 

 sky beautifully clear, and very fine for observations. Had the pulsations of which I took account, as follows. The 



was at c : 7 h 12'" still the same, and now bright : 



h. m. 

 At 7 34, at c, and very bright. 



7 344., dimming, and descending. 



7 35* at 6. 



7 354, at a, and dying away. 



, 



3T, 



38, 



at c, and tolerably bright. 

 do. do. 



7 384,, at c, and very bright. 



40, 

 41, 



7 42, 



do. 

 do. 

 do. 



do. 



and not so bright, 

 do. 



42J, 

 44, 



do. and tolerably bright. 



do. 



do. 



Stronger Light at 7" 8 



h. m. 



At 7 13, at b, and dim. 

 7 14, do. and very dim. 

 7 15, at c, and bright. 

 7 16, do. do. 



7 164., do. and strikingly bright. * 

 7 174, do. do. do. 



7 184,, at b, and dim. 

 7 19, do. do. 

 7 20, at c, and bright. 

 7 224, do. do. 

 7 234., at a, and dying away. 

 7 25, brightening and rising. 

 7 26, at c, and bright. 

 7 264., do. and very bright. 

 7 27, do. do. 



7 274., begins to be dimmed, and to descend. 

 7 28, at 6. 



7 294., at a, and dying away. 

 7 30, at b. 



7 31 J, at c, and bright. 

 7 324., do. do. 

 7 33, do. and very bright. 



The Diffuse Light is very dim, and can scarcely be bounded reliably ; but I give it as it appears to me. 



I notice, as a general thing, that the Light, when it ascends, gets its full elevation a minute or so before it gets 

 its full brightness. 



Very severe work this evening. The gale, with sharp air from the snowy mountains west of us (Bay of Yedo, 

 Japan), seemed to pierce through the whole system; and when the work was through, I found it impossible to get 

 warm. Had an attack of pleurisy in consequence. 



7 444, at d, and quite bright. 

 7 46, do. do. 



7 474., do. and not bright. 

 7 49, do. and bright. 



7 50 ; it seems to be permanent at d : there seem to 



be some pulsations in brightness ; but it is 

 difficult to make them out reliably. 



8 30, permanent at the place marked in chart. 



