114 REPORTS ON THE STATE OF SCIENCE. 
shows similar results up to 11 km. for Strassburg. The monthly tem- 
peratures correspond to about the 5th of each month, but those for 
August to July 30. 
Mean Temperatures for each Month (200+). (Ten Stations.) 
Height | Jan. | Feb. | Mar. April May June | July | Aug. | Sept., Oct. | Nov. Dec. 
Surface 
Sonal 69:0 | 71:4 | 71:7 | 78:1 | 83:7 | 86°6 | 90:9 | 89°9 | 85:9 | 84°5 | 75:9 | 72:0 
1 km. | 70:0 | 69:7 |70°6 | 73°6 | 78-2 | 81°8 | 85°7 | 86-4 | 81:3 | 81:3 | 75:0 | 70°5 
2 ,,  |67°6 | 69-2 | 66-2 | 68-3 | 72:3 | 76:4 | 796 | 802 | 76:2 | 77-2 | 73°6 | 669 
8 ,, |63°6 |64:°6 {59:7 | 632 | 67-4 | 71:1 | 73:4 | 74:7 : ; 32° 
4 ,, |58:0 |59°5 |53-1 | 57-2 |60°1 | 66-1 | 67-8 | 69-1 | 64-9 | 66:5 | 62:5 | 56°5 
5 ,, |51:6 153-0 | 46-1 | 50-6 | 53°8 | 602 | 61:7 | 63:3 | 59°5 | 60-3 | 55°8 | 50:0 
6 ,, | 44:5 145-9 | 38:5 | 43-6 | 47-1 | 53-8 | 55°6 | 56:8 | 53:3 | 53:3 | 49-1 | 43:0 
tf 
8 
9 
» |37:0 | 39:1 |30°8 | 36:2 | 39:9 | 46:8 | 48-3 |49°9 | 46:3 | 46-4 | 418 | 35-4 
» | 290 |81-0 | 23-7 | 28-8 | 32-8 | 40-0 | 40°7 | 42-2 | 39:2 | 39-2 | 34:0 | 288 
» | 22:1 | 24-5 | 19-1 | 22-7 | 25-9 | 31-7 | 33-0 | 35-2 | 32-9 | 32°8 | 263 | 22°6 
10 ,, |165 |19-4 |17-8 | 19-0 | 21-4 | 25-2 | 26-7 | 28°8 | 28-0 | 26-8 | 213 | 17'S 
11 ,, |13°4 |15°6 | 17-3 | 16-9 | 19-3 | 21:9 | 21:3 | 23°6 | 24°6 | 21°7 | 17-2 |13°8 
12 ,, |13°5 {12-8 | 19-2 |17-3 | 19-4 | 20°6 | 22°6 | 21:5 | 24:2 | 18-0 | 15:9 | 13-4 
133 95 15°3 | 18-0 | 20-0 | 17-3 | 20-2 | 21:0 | 23:7 | 22:0 | 23:1 | 16-4 | 16:9 | 10-4 
14 ,, |161 |17-4 | 20-0 | 151 | 20°6 | 21:7 | 24-2 | 22-0 | 22-5 | 16-0 | 16-8 | 12:0 
15 ,, |14:8 |17°0 | 20-7 | 17-0 | 204 | 21:2 | 239 | 21-1 | 221 | 15°7 |15°8 | 10:0 
Number of Observations in each Month at each Height, 
Surface | 33 | 28 | 25 | 43 -| 33 | 27 | 80 | 67 | 38 | 38 «6-333 | «33 
1km. | 34 dl 26 | 45 | 34 29 33 66 42 | 42 | 32 | 32 
oes 32 | 26 | 25 | 41 32 25 | 26 | 65 36 | 41 32 | 30 
By Lechy 32 | 26 | 26° | 41 32 25 | 26 | 65 | 36 | 41 32 30 
Aes 32 | 26 | 25 | 41 30 25 | 26 65 36 | 41 | 32 | 30 
58 55 32 | 26 | 25 | 41 30 25 | 26 | 65 | 36 | 41 32 | 29 
Gh: 32 | 26 | 25 | 41 30 25 | 26 65 |} 36 | 41 32 | 29 
th 32 | 26 | 25 | 39 | 31 25 | 25 65 | 36 | 41 32 | 29 
3) Ba 32 | 26 | 25 | 38 | 31 25 | 24 63 35 | 40.) 32 e227 
Dass 31 25 | 24 | 38 | 31 25 | 24 61 35 | 36 31 27 
10) 75 30 | 21 23 | 34 | 28 25 24 60 | 34 | 36 | 30 | 26 
1h 5. 27 19 LOS |Falae26 21 24 59 32 | 34 30 | 24 | 
120s; 21 15 | 14 | 23 | 24 17 21 48 26 | 33 . 27 | 20 | 
The principal feature in the diagrams is the very marked minimum in 
March and the similar though less marked effect in September. Above 
10 km. the conditions are reversed and the minima are replaced by 
maxima. A similar peculiarity, with which this is indeed connected, was 
found in the height and temperature at which the advective region was 
encountered, and an attempt was made to connect it with the general 
circulation of the atmosphere. The effect cannot be explained as due to a 
mere retardation in the time of occurrence of the minimum temperature, 
because the phase of the annual term shows that this retardation reaches 
its full value at a height of about 3 km., while the depression in March 
increases in intensity up to 8 km., and the minimum in September flatly 
contradicts such an hypothesis. 
It may be suggested that the pressure distribution at the time at 
