l03 Observations on the Temperature of the 



it loses, if the heat, with exposure to the air, be longer con- 

 tinued, may be mentioned, in addition, in favour of the con- 

 jecture of the modifying power of such matter (of low organ- 

 ization V) on carbonate of lime, tending to prevent its crys- 

 tallization, and to impart to it the chalk-like character. 



Barbadoes, November 6, 1846. 



Observations on the Extent and Bate of Changes of Tempera- 

 ture of the Waters in the Estuaries of the Mersey and Clyde, 

 By Mr Ritchie Adie of Liverpool. Communicated by 

 the Author. 



The observations here detailed are a continuation of those 

 given in vol. xl., p. 307 of this Journal, with the stations, the 

 means employed in taking the temperatures, and the time, 

 exactly the same as before described. The present addition 

 will now extend them through winter and summer seasons 

 of a more opposite character than is usually to be met with 

 in a much longer period of time. For the winter of 1844-5 

 was a protracted and severe one ; the summer of 1845 was 

 generally cloudy and cold ; then the winter following, 1845-6, 

 was mild and open, while the summer just gone was one of 

 the warmest experienced for many years ; and, indeed, the 

 cold of the early part of March 1845, and the heat succeed- 

 ing it in fifteen months after, namely, midsummer 1846, may 

 be taken as the two extremes of our climate. 



In February 1846, the temperature of the Mersey^ « _ « - 

 water ranged from J 



March ... at the beginning of the month, 47*1 



towards the end, . . 43 '9 



April .... , . . 43-7 to 49- 



May ... . , . 50-3 to 56-6 



June .... , . 60- to 69* 



July ... . . . Q2 o to 63-2 



August ... . . . 67*5 to 63-2 



September ... ... 64.4 to 59*7 



October .... . . 69' to 49*6 



