CERTAIN HARMONIES OF THE SOLAR SYSTEM. 61 



(87) After an examination of Chaplain Jones' A'ery numerous charts, a selection 

 was made of those which seemed to exhibit instances in which the light was most 



Fia;. 18. Fiav 19. 



extensive, or most conspicuous, and others in which, in one or both respects, the 

 light seemed to be deficient (the character of the light, and not the position of 

 the moon, furnishing the guide in the selection) ; and then the age of the moon, and 

 her position in her orbit were ascertained, for a comparison of the phenomena with 

 theory. 



The following instances were then classified with reference to our hypothesis 

 now under discussion. The Nos. are those of Mr. Jones' charts: — 



Examples under Case Ist. 



No. 219. — Morning of Sept. 21, 1854 ; 1 day before new moon. 



No. 220. — Evening of Sept. 23, 1854 ; 1 day after new moon. 



No. 232. — Morning of Oct. 20, 1854; 1 day before new moon. 



No. 233.— Morning of Oct. 21, 1854; the day of new moon. 



No. 243. — Morning of Nov. 21, 1854; 1 day after new moon. 



No. 259.— Morning of Dec. 19, 1854; the day of new moon. 



(A very marked instance ; and not only was the day that of new moon, but the 

 moon was also in perigee.) 



Mr. Jones, Avithout any reference to the moon's age, or to her distance from the 

 earth, says of the zodiacal light, " At 2h. the eastern zodiacal light was bright, at 

 3h. 30m. quite so. At 5h. it was as brilliant as I have ever seen it, and was espe- 

 cially so within the zigzag" (waving lines toward the lower part of the diagram), 

 " where the light had more of a cone shape than I ever saw it have before.^ .... 

 Sun rose at 6h. 57m." 



Approximation to Case \st. 

 No. 49. Morning of Sept. 2d, 1853 ; 1 day before new moon. 



Examples under Case 2d. 



No. 31. Evening of July 9th, 1853 ; 3 days after new moon. 



No. 114. Morning of Feb. 1st, 1854; 3| days before first quarter. 



' The desenption here is snch as might, in anticipation, have been dictated by the hypothesis 

 under discussion. 



