CONTENTS. 



[The figures refer to the folio at tlie bottom of the page. — The letters near them mean, D. = calculated by Dove ; 

 Gl. = Glaisher ; G. = Guyot ; L. = Lefroy. For the letters before the latitudes, see page 12.] 



Temperature. 



Hourly CoTrections for Periodic Variations. 



^fORTH AMERICA. 

 Station. 



Washington, District Columbia, 

 Philadelphia, Girard College, 

 Philadelphia, Girard College, 

 Frankfort Arsenal, Penn., 

 Frankfort Arsenal, Penn., 

 Toronto, Canada West, 

 Toronto, Canada West, 

 Toronto, Canada West, 

 Toronto, Canada West, 

 Montreal, Canada East, 

 Sitka, Russian America, 

 Boothia Felix, Arctic America, 

 Lake Athabasca, Arctic America, 

 Melville Island, Arctic America, 

 Hecla Cove, Spitzbergen, 



Appendix. 

 Amherst College, Mass., 



Bi. 



A'3. 

 A'3. 



C. 

 C. 

 B. 

 B. 

 A'6. 



A'6. 



A'l. 



A'5. 



A. 



C. 



c. 



c. 



Latitude. 



38 54 N. 



39 58 N. 

 39 58 N. 

 39 57 N. 

 39 57 N. 

 43 40 N. 

 43 40 N. 

 43 40 N. 

 43 40 N. 

 45 30 N. 

 57 3N. 

 69 59 N. 

 59 N. 

 74 47 N. 

 79 55 N. 



Scale. 



Reau. 

 Reau. 

 Fahr. 

 Reau. 

 Fahr. 

 Fahr. 

 Reau. 

 Fahr. 

 Reau. 

 Fahr. 

 Reau. 

 Reau. 

 Fahr. 

 Reau. 

 Reau. 



Page. 



D. 15 



D. 15 



G. 16 



D. 17 



D. 18 



D. 19 



D. 20 



L. 21 



D. 22 



G. 22 



D. 23 



D. 24 



L. 25 



D. 25 



D. 25 



A'l. 42 22 N. Fahr. D. 28 



E 



