PROCEEDINGS, VOLS. 1-50 FOOT-FRANKLIN 



Foot-prints (continued). 



— -Reptilian, at Sharp Mountain. Pa., 



5, 91. 

 Force, central, some fundamental 



propositions of, 16, 298; 17, 98. 



— cosmical and molecular, correla- 

 tions of, 12, 392. 



— magnetic, gravitating and lumi- 

 nous, 14, 607. 



— origin of attractive, 14, iii. 



— which controls stellar systems as 

 well as molecular motions, 10, 97. 



Forces, elastic and gravitating, 13, 

 142. 



— magnetic and galvanic effect of, 

 on iron structures, 14, 603. 



Forestry, on the growth of the, idea 



in Penns3lvania, 32, 332. 

 Forests, burned, 50, 224. 



— of Pennsylvania, 33, 114. 

 Forgery, new methods for the detec- 

 tion of, 33, 251. 



Fork, French normal, exactitude of, 



17, So. 

 Formates, electrolysis of metallic, 



29, 103. 

 Forscher, die, 32, 345. 

 Forshes", C. G., great mound near 



Washington, Adams Co., ^liss., i, 



305. 



— — meteors, 2, 67. 



Fort William Henr}-, journal kept 



during the siege of, 37, 143. 

 Fossil forms, commingling of, 20, 



477- 



in quartzose rocks, of the lower 



Susquehanna, 18, 277. 



— ore bed at Dunning's Creek, Pa., 

 II, 156. 



Fossile, cours de botanique, by Prof. 



M. B. Renault. 19, 287. 

 Fossils from Colorado, New Mexico 



and California, 11, 425. 



— from West-India Caves, 11, 608. 



— Laurentian. from Essex Co., N. Y., 

 II, 237. 



Fossils (continued). 



— Marine, from the coal measures 

 of Arkansas, 35, 213. 



— ■ Miocene, in San Domingo, 12, 

 571. 572. 



— Missouri. 2, 183. 



— of the Rocky [Mountains found in 

 1870-72, 12, 578. 



Foulke, William Parker, obituary no- 

 tice of, 10, 481. 



■ — • — -Pharmacopoeia Londinensis Col- 

 legarum, 9, 224. 



Fowl's egg, mechanical genesis of 

 the, 31, 203. 



Fowler, Henry W., of Coregonus 

 nelsonii Bean, 43, 451. 



Fraley, Frederick, address at centen- 

 nial of incorporation of the Amer- 

 ican I hilosophical Society, 18, 513. 



. — at the centennial of the 



American Philosophical Society's 

 occupation of its Hall, 27, 4. 



■ , — at the centennial of the death 



of Benjamin Franklin, 28, 173. 



addresses at the One Hundred 



and Fiftieth Anniversary of the 

 Foundation of the American Phil- 

 osophical Socity, 32, 7. 17, 159. 



— - — Franklin's association with the 

 Society, 28, 173. 



— - — note on Pennsylvania Bi-Cen-- 

 tennial, 20, 497. 



obituary notice of, 40, i. 



. of John C. Cresson, ij^ 



149. 



, of William Roberts, 20, 



199. 



Francke. Kuno, mediseval German 

 sculpture in the Germanic Museum 

 of Harvard University, 47, 635. 



Franklin, Benjamin, as a meteorolo- 

 gist, 45, 117- 



-association with the Society, 



28, 173- 



Bagatelles, 40, 87. 



biography of, 28, 166. 



31 



