GEOLOGICAL AND NATURAL HISTORY SURVEYS. 819 



and is illustrated by nunieroiis explanatory sections and sketches 

 and is accompanied by a portfolio of eight maps. In this report 

 was brought together the work of all those who had been engaged, 

 with recognition of their services; the geographical material which 

 could be made available; the systematic geology of the State as 

 given in four divisions — namely, the Azoic and Paleozoic, Triassic, 

 Cretaceous, Tertiary and recent formations; historic geolog}'; eco- 

 nomic geology; and an appendix including lists of Invertebrate Fos- 

 sils, by T. A, Conrad; of Extinct Mammalia and Eeptilia, by E. D. 

 Cope; of Minerals, by Rev. E. Seymour; of Vertebrate Animals, by 

 Dr. C. C. Abbott; and of Elevations in New Jersey, from various 

 sources. 



The four general maps were on a scale of 2 miles to an inch and 

 covered the whole State, following the four divisions mentioned 

 above. The map of a group of iron mines in Morris County was 

 drawn to a scale of 3 inches to a mile. Those of the zinc mines of 

 Sussex County, of the Oxford and Ringwood iron mines on a scale 

 of 8 inches to 1 mile. 



By the act of April 1, 1809, the survey was continued for another 

 four years, an annual appropriation of $5,000 being provided for. 

 Professor Cook wos again appointed geologist and continued to act 

 in this capacity and under the several supplemental acts until his 

 death in 1889. He was assisted during these years as follows : 18G9, 

 1870, E. PI. Bogardus (chemist), E. A. Bowser (engineer) ; 1871, 

 1872, John C. Smock (assistant geologist), E. H. Bogardus, E. A. 

 Bowser, George Howell ; 1874, the same, with J. K. Barton, assistant 

 to Bowser; 1875, the same, with Ed. Peiley and R. A, Meeker, col- 

 lectors. 



In the spring of 1875 Professor Bowser was appointed assistant in 

 the Coast Survey Service, with the duty of conducting triangulation 

 survey over New Jersey. He continued this work until 1885, 



The legislature of 1876 passed an act continuing the survey five 

 years longer, v.ith annual appropriations of $8,000. Doctor Cook 

 served, as already noted, with the assistance of the same corps as 

 in 1875, including also W. C. Whitehead and George McC. Taylor, 

 surveyors. The personnel of the survey remained the same until 

 1880, when C. C. Vermeule was added as a topographic assistant. 

 Profs. J. S. Newberry and R. P. Whitfield undertook the descrip- 

 tion of the fossil plants, fishes, and invertebrates, and N. L. Britton 

 the preparation of a list of the wild plants of the State. The assist- 

 ants from 1880 to 1884 were the same but that Mr. Bogardus closed 

 his work in April, 1881. 



136075—20 22 



