Vol XL. 



EDINBURGH ROCK THERMOMETERS. ANNUAL CURVES. 



Old t t and t 2 , and New ti and t 2 . 



PL A TE 2. 



3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 1 3 5 



,%, 



*.. 



*tt> 



° l *t. 



\ 



^, 



% 





Old t, 25.6 feet deep. 



t 2 12.8 „ 



t 3 6.4 „ „ 



t 4 3.2 „ 



New tj 20.9 feet deep. 



t 2 11.1 „ 



t 3 5.0 „ 



3.0 



" >>>> 



35 40 



45 



50 



