CONTENTS. 



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

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



Temperature. 

 Hourly Corrections for Periodic Variations. 



TABLE I. 

 " II. 

 " III. 

 " IV. 

 " V. 

 " VI. 

 VII. 

 " VIII. 

 " IX. 

 X. 

 " XL 

 " XII. 

 " XIII. 

 XIV. 

 " XV. 



u y/ 



" XVI. 

 XVII. 

 E 



NORTH 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., 



Latitude. Scale. Page. 



B i. 38 54 N. Reau. D. 15 



A'3. 39 58 N. Reau. D. 15 



A'3. 39 58 N. Fahr. G. 16- 



C. 39 57 N. Reau. D. IT 



C. 39 57 N. Fahr. D. 18 



B. 43 40 N. Fahr. D. 19 



B. 43 40 N. Reau. D. 20 

 A'6. 43 40 N. Fahr. L. 21 

 A'6. 43 40 N. Reau. D. 22 

 A'l. 45 30 N. Fahr. G. 22 

 A'5. 57 3N. Reau. D. 23 

 A. 69 59 N. Reau. D. 24 



C. 59 N. Fahr. L. 25 

 C. 74 47 N. Reau. D. 25 

 C. 79 55 N. Reau, D. 25 



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



SOUTH AMERICA. 



Rio Janeiro, Brazil, 

 Rio Janeiro, Brazil, 



C. 

 C. 



22 54 S. 

 22 54 S. 



Fahr. 

 Reau. 



D. 

 D. 



26 



27 



