458 [April 18, 1884. 
‘Photodynamic Notes, No. IX,” was communicated by P. 
E. Chase. 
Extracts from a report on the Hams Fork coals of Wyo- 
ming Territory, by P. W.Sheafer, were read by the Secretary. 
Mr. Lesley exhibited # model of the Nittany valley and 
| Bald Eagle mountain, east of Tyrone City, Pa., made by Mr. 
| Hi. B. Harden, from his own surveys. 
| Also a model of the Jones’ iron ore mine in Berks county, 
| by J. H. and H. B. Harden, after their own surveys. 
Dr. TS. Hunt gave an account of his examination of this 
and other like iron ore mines in Pennsylvania, assigning them 
all to the horizon of Prof, H. D. Rogers’ Primal slates, although 
they lie in immediate contact with the Triassic rocks, 
Dr. Frazer described the ambiguity of data respecting their 
true horizon, with facts to prove that while some of the mines 
(as at Dillsburg in York county) penetrate the Trias, these 
may be merely the redeposited detritus of more extensive \ 
i Primal Slate iron ores. 
| The President, to whom the resolution on a change in the 
i Order of Business Rules had been referred, reported an emenda- 
tion of it, which was laid on the table for consideration at the 
i next meeting. 
New members elected :— 
Richard L. Ashhurst, of Philadelphia. | 
Samuel Dickinson, of Philadelphia. | 
Rey. Joseph I’, Garrison, M.D., of Camden, N. J. - 4 
John R. Baker, of Philadelphia. 
| Prof. Kdmund J. James, of the University of Pennsylvania 
i Wharton Barker, of Philadelphia. 
James H. Hutchinson, M.D., of Philadelphia. 
} Francis Jordan, Jr., of Philadelphia. | 
i Herbert Welsh, of Philadelphia. 
i Prof. Henry 8. Frieze, of the University of Michigan. 
i Francis Wharton, LL.D., of Philadelphia. | 
| 7 | 
| a 
