OF OBSERVATIONS FOR TEMPERATURE. 



IT 



diate hours were found by comparison of the respective readings on the last twenty- 

 seven days of the month, as has been explained in similar cases. 



August, 1859. The value 34°.0 for the mean temperature on the 17th was 

 interpolated, which required a corresponding diminution of 0°.08 for each of the 

 hourly means, in order to produce the same monthly temperature of + 3G°.58. 



September, 1859. The means of this month are of little value, the month being 

 incomplete, and the change in latitude (and longitude) very considerable. 



The two following tables contain a recapitulation of the results of the preceding 

 abstracts. Table I exhibits the mean monthly temperature at the locality indi- 

 cated by its latitude and longitude, also the relative maxima and minima, and rela- 

 tive monthly extreme range, as observed in either the bi-hourly or the four-hourly 

 series. The absolute maxima and minima were not recorded. Table II contains 

 the mean monthly temperatures for each observing hour, and is intended to serve 

 as the basis for the discussion of the diurnal variation, while the first table fur- 

 nishes the means for the discussion of the annual variation of the temperature. 

 The column headed '-'mean," in Table II, differs from the corresponding column in 

 Table I, for this reason : that, in Table II, no correction has been applied to refer 

 the mean of six or twelve observations in a day (as the case may be) to the read- 

 ing of twenty-four observations. 



