Range of Atmospheric Temperature. 



581 



The half- quarterly phases (1), (3), (5), (7) are then interpolated in 

 point o£ time, so that sometimes their date will fall upon a given civil 

 daj, and sometimes between one civil day and another. In the former 

 case the mean of seven observations, and in the latter the mean of six, is 

 taken. 



The following numerical illustration will render the method of pro- 

 cedure clear : — 



March 1858. 



UlVli 



Temp. 



Lunar 







Temp. 



Lunar 



day. 



range. 



phase. 





day. 



range. 



phase. 



12. 



15-8 







22. 



25-9 



(2) 



13. 



17-9 







23. 



31-7 



14. 



11-0 







24. 



29-3 





15. 



10-0 



(0) 





25. 



5-5 





16. 



13-4 







26, 



22-2 



(3) 



17. 



9-8 







27. 



20-6 





18. 



11-8 







28. 



12-6 





19. 



15-1 



(1) 





29. 



21-0 



(4) 



20. 



12-9 







30. 



23-9 





21. 



25-8 







31. 



6-7 











(April 1) 



32. 



2-7 





mean of the observations for 12- 



-18 are taken for 



(0). 



mean 



of those 





for 16- 



-21 





(!)• 









„ 19- 



-25 





(2). 



>? 



>> 





„ 23- 



-28 





(3). 



5? 



?5 





„ 26- 



-32 



55 55 





These means will be found in Table III. under lunation No. 40. 

 The above method is easily worked, and it is probably sufliciently ac- 

 curate for the purpose of this research. 



Table III. — Exhibiting the Temperature-ranges grouped according to 



Lunations. 



No. of 

 luna- 

 tion. 



Date of new 

 moon, beginning 

 lunation. 



(0) 



(1) 



(2) 



(3) 



(4) 



(5) 



(6) 



(7) 







































I. 



Jan. 1 8, 





7-9 



8-4 



9-2 



7'3 



7-2 



67 



6-4 



IO"2 



2. 



Feb. i6. 



?) 



io"9 



12*6 



9*9 



IO'2 



137 



137 



117 



117 



3. 



Mar. 1 8, 





12-5 



9-1 



9'i 



127 



i8-o 



17-0 



137 



12-8 



4- 



Apr. 1 6, 



> J 



i8-o 



i9'3 



20-5 



147 



i6-6 



17-9 



i6-2 



13-1 



5- 



May 1 6, 



>> 



14*5 



M7 



187 



17-6 



12*2 



i6-6 



17-4 



18*5 



6. 



June 14, 



J) 



14-8 



147 



17-2 



17-2 



177 



i6-6 



20-2 



17-2 



7- 



July 14, 



>> 



i3"4 



15-5 



15-5 



11-5 



14*6 



15-8 



15-8 



i6'o 



8. 



Aug. 12, 



»? 



i6'3 



19*0 



i6-i 



15-6 



17-1 



i6-9 



147 



20*0 



9- 



Sept. 11, 



>> 



21*2 



II-9 





177 



19-4 



i6-6 



ii-o 



12-8 



lO. 



Oct. II, 



>> 



12-5 



i3'4 



12-9 



9"4 1 



9-8 



6-9 



6-5 



9'i 



2t 2 



