Geology and Natural History. 



•884 per cent of iron, whereas Pro£ W 

 cent. This 0-09 per cent of iron w^ 



r cent of sulphur to make the usual 

 consequently 0*908 j^er cent of suli)liu 

 in combination with iron. 



:ed illustration of the dispropor 



"iffi 



sliington county. The coal is a whitf asli coal, and the 

 lalyzed had been in the cabinet of Marutta coll,-:, lor 

 j-ears, and showed none of the usual tcwU ut v to ili>iii- 



1, in crystallizing, breaks the coal bv its i'.\]iaii>ioii. I he 

 as found by Prof. Worniley to coiitnin only o-:;;.(. per 

 ron, but 3-330 per cent of sulphur. Then' shouM have 

 0'455 per cent of sulphur, if the sulphur wi'if liniiiril to 

 de of iron." 

 Andrews observes, on p. 13;), that ,70/'/ has ha h t<iken 

 from the Drift at several points in Licking Co.. aii.l that in the 

 summer of 1868, gold dust was gathered to the value of seventeen 

 dollars. 



Prof Orton was occupied with Southwestern Ohio, which he is 

 evidently studying with much care. Some observations of his in 

 this region on a peat bed beneath the drift, a discovery of the 

 survey, are published on page 54 of vol. 1, of this Journal for 

 18V0. A large number of analyses of limestones and other rocks 

 of this part of the state by Dr. Wormley are given on pages 151 

 to 153. They show that the Niagara limestone is a true magnesian 

 limestone, containing 40 to 50 per cent of carbonate of magnesia. 



2. Report on the Geological Survey of Iowa; by Charles A. 

 ^^'hite, M. D. : Geological Coi-ps, C. A. White, State Geologist ; 

 <J. H. St. John, Assistant; Rush Emery, Chemist. \ ol. I, 361 pp. 

 large 8vo, with maps, sections and views. Des Moines, 1870.— 

 The geological survey of Iowa was first undertaken by Professors 

 James Hall and J D Whitney, who published their valuable 

 Report, a large octavo volume, in 1858. In 1866 the survey was 

 resumed, under the order of the State, by Prot White, but was 

 unfortunately cut short again by the Legislature before the work 

 ^as half done, yet not before important results were obtained as 

 sbown in the volume just now issued. It is the first of the two 

 volumes of which the Report is to consist. This first volume is a 

 <^lear and succinct account of the physical geographer and geol- 

 ogy of the State, with details respecting several of its counties. 

 After a general view of the Iowa rocks, it treats m its first part, of 

 the surface features, including its elevation, drainage system, lakes, 

 <^averns, &c. ; the Drift and other Quaternary deposits; the soils, 

 Fauies and forest-regions; its climate (a chapter, prepared by Mr. 

 T. S. Panin). In it? second part, it takes up the geology, speak- 

 ing of the several rocks in order of age, giving their characters, 

 characteristic fossils, distribution, etc. Part third, is occupied by 



