 | Andrew Smith McCreath, Persifor Frazer, Franklin Platt, J. Peter Lesley - Clay - 1879 - 656 pages
...Jr. — Geologist in charge of the Survey of Northampton. Lehigh, and Berks counties. AP BERLIN — Topographical Assistant. for mapping the Easton-Reading...range. FRANKLIN PLATT — Geologist in charge of the Survey of Blair county, and the coal fields of Tioga, Bradford, Potter, Lycoming, Sullivan and Wyoming... | |
 | Leo Lesquereux - Geology - 1880 - 888 pages
...Philadelphia. STATE GEOLOGIST. >ETER LESLEY, - Philadelphia. 188O. ASSISTANT GEOLOGISTS. PEBSIFOR FKAZEB — Geologist in charge of the Survey of Chester county....the Satistical Survey of the Anthracite coal fields, Ac. WG PLATT — Geologist in charge of the Survey of Armstrong and Jefferson counties. RH SANDERS... | |
 | John Franklin Carll - Petroleum - 1880 - 666 pages
...Philadelphia. STATE GEOLOGIST. PETER LESLEY, Philadelphia. 188O. ASSISTANT GEOLOGISTS. PERSIFOR FRAZEK — Geologist in charge of the Survey of Chester county....D'INVILLIERS— Topographical Assistant, for mapping the Easton-Reuding range. FRANKLIN PLATT— Geologist in charge of the Satistical Survey of the Anthracite... | |
 | Charles Albert Ashburner - Geology - 1880 - 442 pages
...Philadelphia. STATE GEOLOGIST. PETER LESLEY, - - Philadelphia. 188O. ASSISTANT GEOLOGISTS. PERSIFOR FRAZER — Geologist in charge of the Survey of Chester county....D'INVILLIERS — Topographical Assistant, for mapping the Eastou-Reading range. FRANKLIN PLATT — Geologist in charge of the Satistical Survey of the Anthracite... | |
 | Henry Martyn Chance - Geology - 1880 - 226 pages
...STATE GEOLOGIST. PETER LESLEY, ---------- Philadelphia. 188O. ASSISTANT GEOLOGISTS. PERSIFOR FRAZER — Geologist in charge of the Survey of Chester county....D'INVILLIERS — Topographical Assistant, for mapping the Easton-Roading range. FRANKLIN PLATT — Geologist in charge of the Satistical Survey of the Anthracite... | |
 | William Greenough Platt - Coal - 1880 - 430 pages
...STATE GEOLOGIST. PETER LESLEY, - - - - Philadelphia. 188O. ASSISTANT GEOLOGISTS. PERSIFOB FBAZEB— Geologist in charge of the Survey of Chester county....Topographical Assistant, for mapping the South Mountain. EV D'lNViLLiERS— Topographical Assistant, for mapping the Easton-Reading range. FB AN KLIN PLATT —... | |
 | 1880 - 296 pages
...Philadelphia. STATE GEOLOGIST. PETER LESLEY, - - Philadelphia. 188O. ASSISTANT GEOLOGISTS. PERSIFOR FRAZER — Geologist in charge of the Survey of Chester county....Topographical Assistant, for mapping the South Mountain. EV l> INVILLIERS — Topographical Assistant, for mapping the Easton-Roading range. FRANKLIN PLATT —... | |
 | Andrew Sherwood, Franklin Platt - Coal - 1880 - 166 pages
...FREDERICK PRIME, Jr. — Geologist in charge of the Survey of Northampton, Lehigh, and Berks counties. EV D'INVILLIERS — Topographical Assistant, for mapping...range. FRANKLIN PLATT — Geologist in charge of the Survey of the coal fields of Tioga, Bradford, Potter, Lycoming, and Sullivan counties. WG PLATT —... | |
 | Andrew Sherwood - Coal - 1880 - 294 pages
...— Geologist in charge of the Survey of Northampton, Lehigh, and Berks counties. EV DrlNViLHEHS — Topographical Assistant, for mapping the Easton-Reading...range. FRANKLIN PLATT — Geologist in charge of the Survey of the coal fields of Tioga, Bradford, Potter, Lycoming, and Sullivan counties. WG PLATT —... | |
 | Persifor Frazer - Geology - 1880 - 414 pages
...— Geologist in charge of the Survey of Northampton, Lehigh, and Berks counties. EV DlNviLLiERS — Topographical Assistant, for mapping the Easton-Reading...range. FRANKLIN PLATT— Geologist in charge of the Survey of the coal fields of Tioga, Bradford, Potter, Lycoming, and Sullivan counties. WG PI/ATT —... | |
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D'INVILLIERS — Topographical Assistant, for mapping the Easton-Reading range. FRANKLIN PLATT — Geologist in charge of the Satistical Survey of the Anthracite coal fields, &o. 
