Geology and Mineralogy. 71 



the site of the deep centre of the basin shown on Mr. Emerson's 

 map, 900 feet deep." J. d. d. 



6. Report on the Geology of New Jersey for 1886, by the 

 State Geologist, Prof. G. H. Cook. 254 pp. 8vo. — In the report 

 of Dr. Britton on the Archaean belt it is stated that no division of 

 Huronian has yet been identified. The kinds of rocks are men- 

 tioned and these do not include labradoritic kinds, or promi- 

 nently, pyroxenic kinds. The iron ore beds are all of magnetite, 

 no hematite occurring in the Archaean except as a surface altera- 

 tion production derived from the magnetite. The iron-bearing 

 strata belong with the older part of the Archaean, differing thus 

 apparently from those of the Lake Superior region. Much valua- 

 ble information is given on the stratification of the rocks, and on 

 their kinds and relations. The statement is made (on p. 70) that 

 the term Huronian was introduced by Dr. T. Sterry Hunt in 1855. 

 But in his geological address of 1871, Dr. Hunt says: " The crystal- 

 line infra-Silurian strata to which the name of the Huronian series 

 has been given by the Geological Survey of Canada," words he 

 would not have used, had he himself been the giver. The term 

 first appears in print in the " Esquisse Geologique du Canada;" 

 which was prepared for " L'Exposition Universelle" at Paris of 

 1855, and was printed in Paris in 1855. But the title page has 

 the names of both W. E. Logan and T. Sterry Hunt ; and the 

 preface expressly states that " for the geological facts and what 

 relates to the physical structure of the country, all is due to Mr. 

 Logan (" tout est du a M. Logan ") ; the mineralogy and also the 

 chemistry of the metamorphic rocks and the mineral waters, are 

 the labors of M. Sterry Hunt, by whom the sketch was drawn up." 



The report also treats of the Triassic; the drift; mining of iron 

 and zinc ores ; the greensand beds which are Cretaceous except 

 the upper marl-bed, and gives new analyses of the marls. It is 

 remarked that the greensand marls have their chief value in the 

 phosphoric acid (as calcium phosphate) present; that those con- 

 taining calcium carbonate are most durable ; that the potash has 

 but little present value, since it exists in a silicate and is hence 

 insoluble ; that the marls containing little of either phosphoric 

 acid or calcium carbonate, become active fertilizers when com- 

 posted with quick lime. 



7. Bulletin of the Scientific Laboratory of Denison Univer- 

 sity, Granville, Ohio, vol. ii, parts 1 and 2, May, 1887. Edited by 

 C. L. Hereick, Dept. Geol. and Nat. Hist., and A. D. Cole, Dept. 

 Chem. and Phys. — The Scientific Department of Denison Univer- 

 sity i? among the more active of the country, and especially 

 through the ability and energy of Prof. Herrick, who is artist 

 and engraver as Avell as investigator. The Bulletin, recently 

 issued, commences with an account of the Geology of Lickiug 

 Co., Ohio, with seven crowded plates of figures of fossils, a few 

 of which are of new species, and appended to it is a paper on 

 the Bryozoa of Flint Ridge with one plate, by A. F. Eoerste. 

 There are also parts 2 and 3 of a paper on the Clinton Group of 



