Synopsis of a Meteorological Journal. 325 
Table of the Monthly mean height of the Barometer in inches 
Jor each of the five daily observations recorded in the cece 
during the year 1838. 
1838.— Months. 6 a.m. [104a.m.{ 2pm. | 6p. m. | 10 P.M. [Monthly means. 
January, . . |80.242/30.258/30.219 30.246 30.265| 30.246 
February, . . |30.044/30.072/30.0 17,30.021/30.046] 30.040 
March, - « . {30.138/30.164/30 129 30.121/30.146) 30.140 
April, . . . (|30.056/30.079/30 029 30.025/30.054| 30.049 - 
May, . . . (29.983/29.999/29 97129. 955|29.976, 29.977 
June, rae Ned 30.033/30.053/30.03430.022/30.048 80.038 
uly, . . . |30.180/30.094/30.06520.049/30.070| 30 072 
August, . . |30.051/30.160/30.12930.106/30.141} 30.137 
September, . |30.185)30.196/30.177/30.160/30.181) 30.180 
October, . . |80.073)30.085/30.04530.050|30.084) 30.067 
November, ._ (30.23630.277/30.21920.220|30.243) 30.239 
December, . (30. oe 143/30.094/30.121/30.150, 30.120 
Mean annual results, 30.1 1030. 132/30.0¢ 094/30.0 091 30.117) 30.109 | 
Lable of the Monthly mean height of the Barometer in inches 
Sor each of the five daily observations during the year 1839: 
to which are seo the mean average results for the last seven 
years. 
1839.— Months. Ga.m. | 104. m. 6 P.M. 70 P.M. |Monthly means. 
January, - + (80.198/30.207/30. (0-141 30-18 188/30.248) 30.194 
ebruary, . .  /30.222/30.28 224| 30.227 
March, . . . /30.116/30.163/30.122,30.112/30. 142) 30.131 
April, . . . |30.089/30.115/30.07530.057/30.084| 30.084 
May, . . .  |30.031/30.065/30.02030.000'30,017! 30.027 
June, . . . (29.971/29.999/29.974 29 968|29.989) 29.980 
July, . . . |30.033/30.046)30.024'30.016'30.033) 30.029 
August, . . (30.097/30.109/30. 105/30. 104/30. 30.103 
September, . /30.097/30.1 30. 093)30.081/30.¢ 
October, . . |30.281/30.316/30.263/20.241)30. 
November, . (30.160/30 203 30, 154/30.161/30.185 
December, . (29.948!29.980/29.935)29.954/29.974 
Mean annual results, |30,104/30. 134|30.092)30.091/30.113| 30. ~ 30.106 — 
30.088)30 086 30.108, 30. ~ 30.101 
|Means for seven years, 30.101/30. 123} 
It will be seen that the monthly means of the atmospheric 
pressure in 1838, are found highest in January and November ; 
being equal to nearly thirty and a quarter inches of the baromet- 
tic column. The lowest is found in May, being less than thirty 
inches. The highest monthly means for 1839 are found in Feb- 
ruary and October ; the latter exceeding that of any month which 
I have observed ; although not comprising the highest ranges of 
