110 



Prof. B. Stewart on the Daily 



[Mar. 22, 





Date in Solar 



Date in Declination- 



Difference, in 





curve. 



curve. 



Months. 



a. 



Jan. 15, 1859 



July 15, 1859 



6 



b. 



Nov. 15, 1859 



Apr. 15, 1860 



5 



c. 



Dec. 15, 1861 



June 0, 1862 



5| doubtful. 



d. 



Sept 15, 1862 



Mar. 0, 1863 



Si 



e. 



Aug. 0, 1863 



June 15, 1864 



10| doubtful. 



/• 



Apr. 15, 1864 



Oct. 15, 1864 



6 



9- 



July 15, 1865 



June 0, 1866 



lOj 



h. 



Dec. 15, 1865 



Oct. 15, 1866 



10 



i. 



Mar. 15, 1867 



Aug. 15, 1867 



5 



I shall return again to this subject at a future part of this paper. 



C. Lunar Annual Variation. 



7. For the purpose of discovering this variation the whole period of 

 observation has been portioned out into lunations, beginning with new 

 moon. Each lunation is divided into eight parts, entitled (0), (1), (2), 

 (3), (4), (5), (6), (7) ; (0) denoting new, and (4) full moon. 



These various lunations thus divided, with the corresponding values of 

 the declination-range, are exhibited in Table VI., the values of which have 

 been obtained by a method of treatment precisely similar to that adopted 

 for the Kew temperature-ranges, and described in a previous paper 

 (Proc. Eoy. Soc. 1877, vol. xxv. p. 581). 



Table VI. — Exhibiting the Declination-ranges grouped according 



to Lunations. 



Run- 



Lunation 



















ning 



commencing 



(0) 



(1) 



(2) 



(3) 



(4) 



(5) 



(6) 



(7) 



No. 



new moon. 



















i. 



Jan. 



15, 1858. 



•287 



•322 



•296 



•261 



•317 



•437 



•417 



•387 



2. 



Feb. 



i3> » 



•504 



•470 



•383 



•383 



•473 



'557 



•519 



•504 



3- 



Mar. 





•565 



•609 



•591 



'53 1 



•55o 



•622 



•628 



•529 



4- 



Apr. 



13, >> 



•558 



•606 



•636 



*559 



•542 



•465 



•520 



•510 



5- • 



May 



13, » 



•488 



•412 



*44 6 



•561 



•578 



'544 



•542 



•487 



6. 



June 



II, „ 



•561 



•546 



'536 



'439 



•426 



•558 



'5 6 3 



•536 



7- 



July 



I °, » 



•572 



•616 



'539 



•568 



•6i 7 



•615 



'534 



•462 



8. 



Aug. 



9, » 



•537 



•570 



•556 



•54i 



*55 2 



•582 



'575 



•500 



9- 



Sept. 



7, » 



•526 



• 6 33 



'595 



•53 1 



•486 



'537 



•613 



•602 



IO. 



Oct. 



7, „ 



•506 



"499 



•508 



•539 



•580 



•524 



•522 



480 



ii. 



Nov. 



5. » 



•415 



•362 



'417 



•404 



•337 



•382 



'375 



•276 



12. 



Dec. 



5. » 



*220 



•289 



'367 



'3 6 7 



•35i 



'374 



•319 



•286 



J 3- 



Jan. 



4, 1859. 



•289 



•348 



'3 6 4 



•366 



•387 



•294 



•293 



•368 



14. 



Feb. 



3> » 



•387 



•482 



•47i 



"426 



'479 



•500 



'493 



•511 





Mar. 



4, » 



•555 



•569 



•624 



•645 



•664 



•704 



•676 



742 



16. 



Apr. 



3. » 



•742 



•746 



•867 



•914 



•894 



•819 



•766 



711 



17. 



May 



2, 



•603 



•613 



•621 



•655 



•670 



•640 



•570 



•622 



18. 



June 



1, „ 



"73 6 



•710 



•667 



•625 



•607 



•576 



•647 



•694 



*9- 



June 



3°. '» 



•740 

 •646 



•662 



•561 



•656 



•681 



'537 



•537 



•599 



20. 



July 



29, » 



•685 



•599 



•586 



•638 



•652 



•697 



739 



21. 



Aug. 



28, „ 



753 



•616 



'547 



•652 



•646 



•670 



•631 



•611 



