12 
paroxysmal ejection from a bore hole can only occur in ease 
the upper section of the hole has a larger diameter than the 
lower. 
The first of the series of colored geological county maps 
of Pennsylvania, in preparation by Mr. Julius Bien of New 
York, to illustrate the reports of progress of the Assistant 
Geologists of Pennsylvania, viz: a map of Fayette county, 
was exhibited by the Secretary, who said that its chief value 
consisted in its careful differentiation of the Coal Measures 
into four series, its exhibition of all the isolated patches 
lett by erosion, and, in general terms, the completeness of its 
outcrop lines, carefully traced as they had been by its author, 
Prof. J. J. Stevenson, on foot, throughout the district. <A 
copy of the old geological State map of 1842 (published in 
1858) was exhibited to show the contrast, and the progress 
of our knowledge of local geology of the State, as well as 
to illustrate the different way in which the second survey of 
the State can be carried on, owing to more fortunate cir- 
cumstances. 
Prof. Chase placed upon the blackboard some of his results 
in a search (by request of Professor Draper of New York) 
for some harmonic series of lines in the solar spectrum. He 
gave the coincidences which appear in the case of the Gold 
lines, the Barium lines, and especially of Frauenhofer’s dark 
lines, and concluded with an earnest protest against the 
assumption that such coincidences can be merely accidental. 
Pending nomination No. 839 was read. 
The following report was read by Mr. Price, as Chairman 
of the Committee on the Michaux Legacy : 
“Ata meeting of the Committee on the Michaux Legacy, of the Amer. 
Phil. Society, held September 8, 1877, present F. Fraley, Eli K. Price, 
Wm. M. Tilghman, and J. B. Townsend, it was 
“* Resolved, That out of the reserved interest of the Legacy, trees from 
Fairmount Park be planted in the grounds of the University of Pennsyl- 
vania, not to exceed in cost one hundred dollars ($100). 
“« Resolved, That it is recommended to the Park Commissioners to supply 
the trees for the above purpose, as far as suitable, from importations made 
by the Society’s appropriations to the Park Commission out of the Income 
of the Michaux Legacy.”’ 
