288 ABSTRACTS OF THE MAKERSTOUN OBSERVATIONS, 1843. 
The mean pressure is greatest for the mean meteorological winter, and least for the warmest quarter 
of 1843. 
The mean pressure for the year 1843 = 0:50 Ib. ; 
The monthly means of the mazimum pressures, Table XXIII., bear to the monthly means of the mean 
pressures, Table XXIV., the following ratios :— 
Jan. Feb. March. April. May. June. July. August. Sept. Oct. Nov. Dec. 
1:57 1:66 1:78 1:80 ari 1:80 1:80 2°35 2:00 2-00 2:08 1-98 
The mean for the year of the maximum pressures is 1-82 times greater than the mean for the year of the 
mean pressures. 
TABLE XXV.—Maximum Pressure of Wind in each Civil Day in 1843, with the Monthly Means. 
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If the maximum pressure observed at 18" on Monday morning was greater than the maximum observed 
about noon on Sunday, the former was taken as the maximum for Sunday. 
The monthly means of the maximum pressure of wind in each day follow nearly the same law as the 
monthly means, Tables XXIII. and XXIV. 
