254 Mr. Folger’s observations of the solar eclipse, Sept. 1811. 
~ both said they did not observe it. I doubt whether they could have 
seen it with glasses of such small power as they used. 
After the eclipse had begun, I measured the chord CD with the 
micrometer twice, and then the line EF (or greatest breadth) until 
near the end of the eclipse.. I found it extremely difficult to meas- 
ure the spaces accurately, especially the larger ones, as the telescope 
was not mounted on a stand.—The times and measurements follow. 
ee 
Meantime. . Turns. 
Tae iT 5 Chord CD 17°36 18’ 40"°7 
10 -9 Chord CD 21-90 23 33°83 
34 55 +1 Space EF 19°30 20 45 °9 
89 55 +3 - - 17°91 19 16°2 
2 04 02 ‘0 - 11°11 ti 572 
11 27 °3 . - 8-07 9 3941 
15 38 5 - - 7°4A, 8 00°3 
Q7 24 +9 “ - 5°14 5 31°8 
80 50 0 - i See “4° 58°9 
35 O1 °0 - - 4°58 4&4 56°6 
42 55 *4 ~ - ~ 6 29°9 
46 52 °6 - - 685 _ 7 29-2 
51 37 °7 - > 7°75 8 20°83 
55 56 °9 saat - 9°16 9 51 °4 — 
3 O07 55 °3 “ - 12°77 13 44 4 3 
12 17 4 ; = 14°99 16 07 °6 
17 14 6 “ ~ 15°48 16 39 +4 
88 03 °2 - - 22:05 23 43 °5 
49 47 -6 - ~ 26°39 38 23 °F 
The place where the ssliote: was observed is about S E, distant 
ebigs O feet, from the S W meeting house, noted on the map of 
_ Massachusetts, in the latitude of 41° 15’ 32”, 
