Barometric Observations. 317 
Crumpsall, Lancashire, Oct. 9, 1821. 
Sir,—I send you observations made here, and at Manches- 
ter, on the 10th of September, and the Sth of October. 
Your obedient servant, 
To Dr. Tilloch. Joun BLACKWALL. 
CRUMPSALL. 
Bar. |) rbot: | Ther. | -wina. Wenihier. 
att. det. 
1821. A.M. — 
Sept. 10th 8b. |29-295| 56° | 54"5 | S. light. Cloudy, with gleams 
9 |29.310| 57:5 | 57 S.W. fresh. |Do. - [of sunsh. 
10 {29.310} 59 59°5 |S.W. do. Do. 
11 |29.320| 60-5 | 61 (|S.W. do. Do. 
12 |29.320| 61-5 | 62 |S.W. do. Do. 
P.M. 1 = |29°330 | 62 63-5 |S.W. do. Do. 
: [sunshine. 
8 |29-520 | 56 54:5 {S.W. do. Foggy, with faint 
9. |29-520 | 56 55°7 |S.W. do. Cloudy, with gleams 
10 {29-540 | 57 56:5 |S.W. do. Do. [of sunsh. 
11 |29-560 | 56 55 |S.W. do. Do, 
12 .|29-575 | 56 56:2 | W.. brisk. |Do. 
P.M, 1 {29-600} 55:7 | 55 W. high. |Cloudy. 
MANCHESTER. 
Ther, | Ther. 4 
1821. AM. Bar. att, ade Wind. Weather. 
8", 29.500} 62° | 60°5 |S.W. fresh. |Cloudy. 
9 (29.530) 64 63°5 |S.W, do. do. 
10 29.540] 66 65:5 |S.W. brisk. | do. [gleams. . 
11 |29.545| 66:5 | 66 |S.W. do. Cloudy, with sun 
12 [29.560] 69 67:5 |S.W. fresh. |Cloudy. 
P.M. 1 9:570) 71 67:5 |S.W. do. Cloudy, with sun glea. 
8 [29-700] 61 54 |S.W. do. Clear, and sunny. 
9 |29-720| 625 | 56 (S.W. do. do. 
10 {29-750} 63 58:5 |S.W. do. Cloudy. 
11 {29-755} 61 59 |S.W. do. Clear, and sunny, 
12 |29-780| 65 59 =|S.W. do. Fine, with some cirri. 
P.M. 1 |29-810| 68 59-5 |S.W. brisk. {Cloudy. 
Leighton, Oct. 24, 1821. 
Dear Sirn,—! beg leave to send you the observations made at 
Leighton on the 8th instant, with those of Colonel Beaufoy at 
Bushey, 
LEIGH 
