Ih'lative Temperatures of the Earth, 



TABLE OF 



Of the respective Temperatures of Surfaces covered with Grass, and of those 

 on the North Side of Dublin, at an Elevation of about 



The Observations taken and register made, at Nine o'Clock a. m. and 





Grass. 



Earth. 



Grass. 



Earth. 



Air. 



Air. 





Date. 



Morning. 



Morning. 



Evening. 



Evening. 



Morning. 



Evening. 





1835. July 9 



63-5 



61- 



61- 



61-4 



67-5 



56.5 





JO 



59- 



59-2 



60- 



59- 



59-8 



54- 





11 



59-1 



58-6 



60-3 



59-6 



60-4 



57-7 





12 



61-2 



60-5 



61- 



60-6 



62-9 



55-3 





13 



60- 



58-9 



61.1 



60-8 



61-9 



35- 





14 



60-4 



59-4 



63- 



61-8 



63- 



60-1 





15 



64-3 



62-8 



62-7 



62-1 



68-3 



57-1 





: 16 



60-7 



60-1 



62-8 



61-2 



60-8 



57-7 





17 



63- 



62-3 



64-4 



63-9 



64-6 



61.7 





18 



64-5 



63- 1 



63-3 



62-1 



67-6 



59-7 





19 



63- 



60-8 



63-5 



61-4 



65-7 



60-7 





20 



64- 



62-5 



66-2 



64-9 



66-8 



61- 





21 



65-2 



64-1 



66-4 



65-9 



63-5 



58-8 





22 



67- 



65-2 



68-1 



67-2 



66- 



59-9 





23 



67-5 



66-3 



68- 



67-6 



66- 



61-9 





24 



67- 



66-5 



69-5 



68- 



67- 



62-8 





25 



68- 



66-8 



69-7 



68-7 



66-4 



62- 





26 



69- 



67-3 



69-9 



69-4 



65-4 



60-1 





27 



68-7 



68-1 



68-3 



68-5 



65-7 



56-5 





28 



68-2 



67-4 



66-9 



66-7 



67-2 



58-4 





29 



72-2 



66-1 



71-5 



69-5 



65-6 



63-1 





30 



66-7 



67- 



68-9 



68.7 



65-8 



60-4 





31 



65-5 



65-3 



68-2 



68- 



63-3 



58-8 





August 1 



69-3 



68- 



68- 



66-5 



69- 



62-7 





2 



66.2 



65-3 



70-5 



68-5 



63-6 



61- 





3 



69-5 



66-8 



68-7 



68- 



67-8 



58-6 





4 



69- 



67-5 



68-5 



66-7 



69-3 



63-3 





5 



66- 



64-8 



66- 



64-4 



63-6 



61-2 





6 



65-7 



65- 



65-5 



64-3 



65-2 



62-8 





7 



65-3 



64-5 



63-5 



62- 



63- 



55- 





8 



66-8 



66-7 



66-4 



66- 



64- 



53 8 





Averages - 



65-3 



64-1 



65-8 



650 



65 03 



59-20 





It will be observed, that the difference of temperature occa- 

 sionally amounted to as much as S°; and that the average dif- 

 ference in the morning v^sls above 1°, and in the evening nearly 

 1°. 



A careful examination of the table will present some interest- 

 ing relations between the aerial temperature, the state of the 

 weather, &c., and the temperatures of the surfaces of grass and 

 earth. They are hardly sufficient, however, to enable it to be 

 pronounced with certainty to what cause the difference of tem- 

 perature is to be assigned ; whether to some result of the prin- 



