On the Thermometer. 



137' 



on the same subject, which you did me the favour to insert 

 in the Philosophical Magazine for June IS 10. 



I am, sir, your obedient servant, 



Rd, Walker. 



Oxford, Feb. 12, J813. 



COLUMN I. 



COLUMN III. 



W. 



F. W. 



212 



200 

 190 

 180 



i;o 

 160 



150 

 140 



130 

 120 

 HO 

 100 



go 



60 

 70 

 62 



150 

 1 140 

 130 

 120 

 110 

 100 

 90 

 80 

 70 

 60, 

 50 

 40 

 30 

 20. 

 '0. 

 It. 



