/Synopsis of a Meteorological Journal. 



325 



Table of the Monthly mean height of the Barometer in inches 

 for each of the five daily observations recorded in the Journal 

 during the year 1838. 



1838.— Months. 



January, 



February, 



March, 



April, 



May, 



June, 



July, 



August, 



September, 



October, 



November, 



December, 



Mean annual results, 



6 A. M. 



30.242 

 30.044 

 30.138 

 30.056 

 29.983 

 30.033 

 30.180 

 30.051 

 30.185 

 30.073 

 30.236 

 30.094 



30.110 



10 A. M. 



30.258 

 30.072 

 30.164 

 30.079 

 29.999 

 30.053 

 30.094 

 30.160 

 30.196 

 30.085 

 30.277 

 30.143 



30.132 



2 p. M. 1 6 p. M. 



30.21930.246 

 30.017|30.021 

 30.12930.121 

 30.029'30.025 

 29.97129.955 

 30.03430.022 

 30.065|30.049 

 30.129,30.106 



30.177 

 30.045 

 30.219 

 30.094 



30.094 



30.160 

 30.050 

 30.220 

 30.121 

 30091 



10 p. M. 



30.265 

 30.046 

 30.146 

 30.054 

 29.976 

 30.048 

 30.070 

 30.141 

 30.181 

 30.084 

 30.243 

 30.150 



30.117 



Monthly means. 



~3a2T(r' 



30.040 

 30.140 

 30.049 

 29.977 

 30.038 

 30 072 

 30.137 

 30.180 

 30.067 

 30.239 

 30.120 



30.109 



Table of the Monthly meati height of the Barometer in inches 

 for each of the five daily observations during the year 1839 : 

 to v)hich are added the mean average results for the last seven 

 years. 



1831).— Months. 



January, 



February, 



March, 



April, 



May, 



June, 



July, 



August, 



September, 



October, 



November, 



December, 



Mean annual results, 



Means for seven years. 



6 A. M. 



30.198 

 30.222 

 30.116 

 30.089 

 30.031 

 29.971 

 30.033 

 30.097 

 30.097 

 30.281 

 30.160 

 29.948 



30.104 



30.101 



10a. M 



30.207 

 30.281 

 30.163 

 30.115 

 30.065 

 29.999 

 30.040 

 30.109 

 30.128 

 30.316 

 30.203 

 29.98C 



30.134 



30. 12^ 



2 p. M. I 6 p. M. 



30.14130.188 

 30.205 30.206 

 30.122|30.112 

 30.07530.057 

 30.020 30.000 

 29.974'29.968 



30.024 

 30.105 

 30.093 

 30.263 

 30.154 

 29.935 



30.092 



30.088 



30.016 

 30.104 

 30.081 

 30.241 

 30.161 

 29.954 



30.091 



30.086 



10 p. M. 



Monthly means. 



30.248 

 30.224 

 30.142 

 30.084 

 30.017 

 29.989 

 30.033 

 30.098 

 30.099 

 30.266 

 30.185 

 29.974 



30.113 

 3008 



30.194 

 30.227 

 30.131 

 30.084 

 30.027 

 29.980 

 30.029 

 30.103 

 30.100 

 30.273 

 30.173 

 29.958 



30.106 



30.101 



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- 

 ric 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 



