Meteorological Cbservations at Hudson, Ohio. 271 
The most remarkable atmospheric disturbances are confined to 
the cold months, and are altogether unknown in summer. 
THERMOMETER AND HYGROMETER. 
1841. 1842. 1843. 1844. ¢ Mean 7 years. 
Ther. | Hyar.| Ther.) Hygr.| Ther. | Wyer.| Ther. | Hygr.) Ther. | Iyer. | Diff. 
March, 9 A.M. |36°7° 29-39 [43-39 36-89 [25:80 17-09 |39:2° |34-4° {37-80 |30:9° | 6-90 
YY 3p.M. [462 (31:9 [51-1 (386 [34:3 [20-0 |45°7 [37-4 [46-2 |33-3 {12-9 
April, 9a.mM. 443 |88&:1 [53-1 (440 {50° \41-0 61:1 j51°7 (51:5 [42:5 | 90 
‘ 3p.M. (51:2 (398 |61-6 [47:9 [56:3 |42:7 1700 |55°5 159-4 |45:0 j14-4 
May, QYa.M. (56:2 47:0 156-0 |47-4 159-5 '48.9 162°0 |54°7 [58-1 |49:°9 | 8-2 
a 3PM. |63°2 |48:6 |62°6 (48:3 {68:3 50-7 684 (56:3 [64-8 |51:2 |13-6 
June, 9A.M. |72°5 1648 (65:3 (58:5 (65:7 59-4 (67-5 |60°3 [67-8 |61:0 | 6-8 
e 3e.M. |78:1 (66-7 |71-8 {59:8 {71:8 (62:0 |73:2 |62°6 473-6 |63-2 }10-4 
July, 9a.m. |72°3 162-6 |71:1 (63:9 |73:2 (65:4 |73°8 |67°8 172-9 |65:°9 | 7-0 
fy 3p.M. |787 |646 |76:5 (63:3 |79-0 (65:4 |78:°7 |70-4 {78-6 |67-2 {11-4 
Aug.: 9a.m. |70°3 |64:2 168-5 (63:7 |70-7 64:9 |68-9 69:8 \642 | 56 
ce 3p.m. |77-9 (66:0 {74:3 \646 176-8 |66-6 |73:7 76-1 |66:0 [10-1 
Sept. 9a.m, |64-9 |62:3 |61-7 58:3 65:7 (62-0 {62-2 |60:0 [61-5 |58-1 a4 
ie 3p.m. |73:1 [645 (69-7 [59:3 |72-0 '64-4 '69°8 636 [69:5 |60:2 | 9-3 
Oct. Q9a.m. [446 (39-8 [47-5 [45:1 [46-3, 43:8 |47°7 |45°3 [48:0 |44-4 | 3-6 
ce 3Bp.m. |52°7 (41:1 [57-4 (46°1 151-1 (45°93 (53:4 |46:7 [55-4 |45:°9 19:5 
Nov. 94.mM. |88°8 (84:9 (82-7 |29:1 {36:1 |31:6 (40:2 |36:5 [35:6 |31'7 | 3:9 
st 3P.M. |42°3 (35:0 [40-5 (30:9 {40-4 33-2 45-3 88:2 f415 (33:2 | 83 
Dec. Qa.m. |381-1 > (28°7 (28°7 (24:97 133-0 29:9" }82:3. /29°2, #290 |25:9 1 3:1 
. 3P.M. [35°38 [29:1 [33:4 (25:5 (36-4 315 {35:8 31-1 133:3 126-9. | 6-4 
Jan Qa.m.°|31-4 (265 |30-4 (26:0 [26:6 (23:9 (33-7 28:1 (23:3 | 48 
oh 3P.M, [368 [265 [36:2 276 [815 (249 1373 j33°'7 |24:8 | 89 
Feb. Q9a.mM. (31:8 |26:°3 |20-4 lees 30°9 [26-7 {32-6 29°3 |23:8 | 5:5 
ig 3P.M. [39:7 |29:0 [80:1 1165 (40:5 (31:7 |40:9 38:1 (26:1 12:0 
The following table shows the average for the seasons, for seven 
years, to which I have added the mean degree of humidity at 
Hudson, Toronto and Greenwich, complete saturation being call- 
ed unity. 
HUMIDITY. 
Seasons. Thermom. | Hygrom. | Diff’nce.} qyyqson. ATO huOun GLeenunitoht 
Spring, 9 a.m.| 49-19 | 41-19 | 8-09 -759 ‘72 | -786 
3 pom) 96:8 °| 43:2" | 13-6 | 629 Olu | Ok 
Summer,9 a.m.| 70:°2 | 63°7 6:5.) 807 "76 | ‘725 
apm) fol || 65°5 "| 10-6 | “709 63°", | Gao 
Autumn,9 a.m.) 48-4 | 44:7 3°7 | -879 ‘827 1 dS 
3p.m.| 55:5 | 46-4 S-U"} +733 ‘715 | -846 
Winter, 9 a.m.) 28°83 | 24:3 4-5 | ‘854 36).7)) 94L 
9-1 
a7 
3 p.M.| 35-0 25:9 C Til 19 ‘878 
Year, Qa.m.| 49-1 | 43-4 5-7 | -823 ‘79 | -840 
3p.m.| 55:8 | 452 | 10-6 | 697 685 | -765 
Thus it appears that the humidity of Hudson is generally in- 
termediate between ‘Toronto and Greenwich; but Greenwich is 
drier than Hudson in summer, and Toronto is more humid in 
winter. 
In order to determine the mean temperature of Hudson, we 
need to know the relation between the mean temperature and the 
9 o’clock observation. 
