213 
for the last ten years at the Bath Literary and Scientific Institu- 
tion. {f would only observe at present in a general way that two 
places having identically the same mean temperature may yet 
differ widely in climate, from the much greater heat in summer, 
and the much greater cold in winter, in one of the localities than 
in the other.* 
I proceed now to give the results above referred to in a series 
of Tables. It must however first be remarked, that the number 
of years is not the same in all the tables, from the circumstance of 
the Institution Registers having been commenced in 1865, in 
March, the first month of the spring, and not in January in mid- 
winter. This very well allows of the seasons being determined 
from ten years’ observations, and perhaps these are the results of 
most value, but it does not allow of the mean temperature of each 
civil year, i.e. from January to December, being determined from 
more than nine years’ observations. 
TABLE I. Showing the Mean Monthly and Yearly Temperatures deduced 
from the Daily Readings at 9 a.m. and corrected for diurnal range, from 1866 
to 1874. 
Jan. | Feb. | Mar. | Apr. | May. | June. | July, | Aug. | Sept.| Oct. | Nov. | Dec. naar 
1866 | 44.5 | 41-5 | 41.5 | 49.6 | 52.5 | 60.7 | 60.2 | 59.3 | 56.8 | 52. | 46.8 | 44.9 | 50.9 
1867 | 36.7 | 46.4 | 38-7 | 50.2 | 53-4 | 57.8 | 60.4 | 61.9 | 58.6 | 50.8 | 40.0 | 39.8 | 40.5 
1868 | 40.2 | 42.4 | 46.2 | 48.5 | 56.8 | 61.5 | 66.3 | 62.6 | 59.7 | 48.0 | 43.0 | 48.5 | 52.0 
1869 | 43.6 | 46.8 | 40.4 | 51.6 | 50.2 | 56.8 | 63.2 | 61.2 | 59.5 | 51-6 | 44.2 | 38.7 | 50.7 
1870 | 40.0 | 38.2 | 41-0 | 50.0 | 53.4 | 60.4 | 64.0 | 62.6 | 56.3 | 51.3 | 41.8 | 34.2 | 49.4 
1871 | 35.2 | 44.8 | 46.0 | 49.8 | 53-8 | 55.8 | 60.5 | 65.2 | 56.5 | 505 | 38.4 | 383 | 49.6 
* See further on this point “ Observations in Meteorology,” p. 359. 
