Mr. Bowditch on the total eclipse, June 16, 1806. 275 
Additional observations on the total eclipse of June 16, 1806. 
The mean times of this observation at Salem, given in the 20th 
page of the 3d volume of the Memoirs of the American Academy of 
Arts and Sciences, were estimated by using the equation of time giv- 
¢n in the Nautical Almanac for 1806, which I have since found ex- 
ceeds that in Delambre’s new solar tables by 12. The equation at 
the time of the conjunction by the Nautical Almanac is 6’*7 and by 
Delambre’s tables 5"*5. The apparent times of these obseryations at 
Salem are, the beginning 10%. 6’ 18”*1, beginning of total darkness 
11h. 25’ 19"*4, end of total darkness 114. 30’ 7”*3, end of the eclipse 
Oh. 50’ 346. The place of observation is 53 seconds in time east 
from Cambridge, as found by the survey made by Professor Farrar 
and myself. ‘The elements at the beginning and end of the eclipse by 
the tables of Delambre and Burg are as follows. 
| Beginning. End. 
soe times of sie sons at Salem - 22 06 18:1 | 0 50 346 
Mean times of observation - aie 22 06 22°8 | O 50 40°8 
Longitnde west from Greenwich 443 367 | 4 43 36-7 
Mean times of eee eee to ) Greenwich 249595 | 5 34 17+5 
O's right ascensi 5 36 49°38 5 37 183 
©’ s longitude from the apparent equmot - 84°41 01°7 | 84 47 33-9 
©’s horizontal parallax - - 8 
©’s semidiameter — Irradiation 35 - 15 42°54 15 42°53 
©’s horary motion - : 2 23°15 2 23915 
Apparent dbicroits of the eaBptkc eos 8 23 27 ‘53-0 
D's longitude trom the apparent cmigg > 83 49 33:2 | 83 30 02-2 
D’s latitude north decreasing 24 24*9 15 O81 
D’s hori pa aes, EES Salem 5-49 60 08-71 60 11°81 
P Reeisdinn infec 2paug. sam "22 & dos ea. 16 39°66 16 41°64 
D’s horary motion in longitude 36 39°69 36 43°43 
>’s horary motion in latitude 3 22-24 3 22°98 
>’s horary motion from the sun in o longitude 34 16°54 34 20°28 
>” § parallax — ©’s parallax - 60 00°05 60 03°15 
** 
