Meteorology. 487 
Society and other authentic sources, due al- 
lowance being always made for the difference 
in the absolute heights of the two baro- 
meters. 
MEAN HEIGHT OF THE BAROMETER 
At Manchester. 
¥rs. | Jan. | Feb. } Mar. |April.;May, )June.{ July.| Aug. | Sept.{Octo.] Nov., Dec. 
1794) 29.94/29.71)29,86|29.80/29.91|29.97/29.92)29,84/29.78|29.70|29.64/29.88 
1795) 30.03 29.60|29.76|29.71/30.11|29.80/29.89|29.89|29.99|29.52|29.70'29.82 
1796) 29 47'29.77/30.04|30.02/29.70/99.89)|29.66/30,09|29,.90/29.88/29, 83/29,92 
1797|30.00)30,23/29.94|29.77|29.78|29.83/29.96| 30.06] 29.64|29,81129.87|29.60 
1798/29.85|30.02/29.91/29,.87/29,96/ 30.01 |29,72) 30.08) 29.75/29 :63)29.48/29.87 
1804|29.66|30.09|29.62 
1805|29,57|29.77|29.91 
1806| 29,52|29.85|29.82 
1807|30.10'29.81|30.08 
1808 29,84 30.18|30.25 
1809|29.57|29.72|30.12 
1810|30.15)/29.85|29.74 
29.69|29.81|30.11 }29.86|29.90|33.16|29.64/29.87/29.83 
29,87|29.95|30.04|29.97| 29.97|29.97|29.94/30.28|29.80 
30.17/30.03|30.15|29.83]29.87|30.07|29,95|29.75129.45 
29.76|29.85|30.07|29.96|29.94|29.84|29.90]29.55|29.85 
29.93|29.95|30.05|29.98|29.93/29.91|29.76129.78|29.87 
29.86 |29.96|29.98|29.98|29.80/29.80|30,23/30.03|29.82 
29.90|30.00|30.20/29.86}29.96|30.07|30.06|29.55|29.77 
1811|29.95|29.53|30.18|29.86|29.90|30.05/30.18|30.02|30.07|29.70|30.01|29.79 
1812|29.95|29,68}29.88 |30.05|29.98|30.05|30.07|30.13|/30.16/29.53|29.94130.07 
1813|30.14 29.77/30.23/30,05|29.84)30.13|/30.00/30,17|30.11|29.75|29.81|29.90 
1814/29.66 30, 12|29.86/29.91/30,11/30.14|29.94/30.03|30.22|29.86)29.76|29.70 
1815|29. 94 29, 83/29.77/30.02|30.00/29.97/30.20/30.00/30.05/29.92|30.04/29.83 
1816/29.70 29:91|29,82 /29.82|29.93/30.02/29.74/30'05|29.99/29.94/29.86/29.80 
1817/29.84 29.97|29.68/30.35|29.87| 29.26 |29.80/29.83/30.09/30.11/30.02/29.66 
1818|29.82 
ted for|/29.82, 
29,.84/29.89 
29.79|29. 54|99.76/30.01/30. 12|30.15/30.17|29.85/29.95|29.91130.14 
29.86|29.88)29.95/29,85|29.90/29.89/29.80/29.78 |29. 79 
