490 Meteorology. 
years.—I found the results, corrected. for 
temperature, as under; namely, 
Jan. Feb. March, April, May, . June, 
29.87 29.86 29.93 29.85 29.88 2993 
July, Aug. Sep. Oct. Nov. Dec. Mean. 
29.87 29. 91 29.88 29.84 29.82 29. 84 || 29.87 
Here again the months March, May, June, 
July, August and September, are all at or 
above the mean; and January, February, 
April, October, November and December, 
are all at or below the mean.* 
By comparing: all these together it Sabla 
seem to be established as a fact, that from 
March to September, the weight of the at- 
mosphere is greater than from September to 
March, in this part of the world.—This 
* I cannot refrain from the remark that some of the 
annual tables of the Royal Society’s meteorology, e¢xhi- 
bit marks of extreme carelessness. In the table for 1815, 
I found four out of the twelve monthly means of the ba- 
rometer greatly erroneous ; namely, January, April, May, 
and October. The monthly means for August 1807, and 
September 1808, are also greatly wrong. These errors 
were detected by a comparison with my results for the 
same months; as I found. the results. at both places irre- 
concileable according to the known laws of barometry. 
As the above work, sanctioned by such authority, will 
naturally be regarded as a national standard in meteoro- 
logy; it is greatly to be desired that the whole of the 
tables were revised and corrected. 
io 
