INDEX. 



335 



Economical Geology 155 



Booilomical Materials, List of, 165 



Elephant, Fossil , 132 



Elk, Fossil, 132 



Elm trees, 281 



Emmet Co. 72 



IfiBcriraifes, 69 



lEhniskillen, C. W. , 72, 73, 79 



Brie, Monroe Co. - 205 



" Erratic Block Group " 12 



Euomphaloid casts in Carboniferous Limo- 



«3ne, 110 



BuompJiaVus, 64 



Evanaton, 111. ,... 67 



.Exhibition of Geological Specimens at 



State Fair, 28 



Explorations, in 1859 23,24 



in 1860, 26,27 



. in vicinity of Cleveland and Cuyahoga 

 Falls for comparison, 27 



W. 



Fair, State Agricultural, Geological Exhi- 

 bition at, 28 



Farmer, John, aid received from 33 



WwisteUa stellata 53 



Phootites Niagarensis 56 



8p ? 69 



HhtesteUa metmbranacea, 104 



sp? 104,105 



Fish remains 64, 69, 85,,102, 110, 115 



Fisk, L. H., quarry of 113 



Fisk, Prof. L. R., chemical analyses by,. . 31 



(Flagstones of L. Huron, 73,74,76 



SIM Rock Pt.,L. Huron, ' 80 



Flora of Lower Peninsula. See " Plants." 



Flushing, Genesee Co. , 118, 119, 120 



Formulae for equivalent values of strength 



of brine, 181 



Fossiliferous strata 49 



.Foster and Whitney, U. S Geologists,.... 15 



Fowle , Benjamin , aid received from, 33 



.Francis, Mr., Drummond's I. 69 



IFrazer and Stanton, coal mining of, 122 



G-. 



Gaines, Sent Co. 98 



Galt.C. W., 69 



Gas, from coal, 160 



from peat, 196 



Gasteropoda, Catalogue of, 235 



General Observations on the Geology of 



the Lower Peninsula, 135 



Geneaoo Co. , 114 



Geological Series, how complete in Mich., 41 

 "Geologists," self-styled, cautions against, 35 

 Godfrey , Freeman, operations of, for gyp- 

 gam,.. M* 



Gsmphocercu, ■ • • J* i Jf 



Goniatilas, 80,85,88 



rotatoria*, 86 



Ixion ° 6 



pnnceps, 86 



Ouxni •» 



Gooseberries, 264 



Grammysia, ••.•',"A 21 



Grand Lake, Presqu' Isle Co. 62 



Grand -Rapids, Carboniferous Limestone 



a t * 98 



GrandRapids, salt explorations at, .24, 25, 166 



Grand Traverse Bay, 70, 72, 77, 130 



jjrandvlllo, Kent Co., 90 



,«ratiot Co. • 11* 



« Gray Limestone," 13 



:GreenBay •• ^,61 



Green Oak, Livingston Co 133 



was. 



Grindstone Creek, Eaton Co.,' 121 



Grindstone Grit of L. Huron, 74,75,79 



Gunpowder from peat, 19T 



Gypsum , at Littlo Pt. au Chene 6T 



at Sylvania, Ohio, 69 



in Monroe Co., 69 



at Dotroit, 69 



in Kent Co., , 81 



at Plaster Bluff, Bay Co. 94 



analyses of, 163 



consumption of, 166 



H. 



Hall, Prof. James, aid received from,.. ... 31 

 on the geological position of the Black 



Bituminous Slate, 79 



on the Cephalopods of the Marshall 



Sandstone, 87 



Halysites escharoides, 66 



Hamilton, C. W., 61 



Hamilton Group, description of, 69 



distribution of, 70 



economical importance of, 71 



palseontological peculiarities of 135 



thickness of 164 



" Hamilton Shales," -79 



Hanover, Jackson Co. , 84 



Harbor I., Brine spring at, 69 



Hard Wood Pt.,L. Huron, 80 



Hare's Back, L. Michigan, 61 



Hayden's Coal Mine 113, 116 



Helderberg Group. See " Upper Helder- 

 berg Group." 



Heliolites spinipora, 66 



Hemlock trees, 296 



Henry, Alexander, flrBt miner of L. Supe- 

 rior 6 



Henry, Prof. J. , aid offered by, 81 



Hess, M. B., aid received from, 33 



information in possession of, ■ 9T 



Hibbard's Artesian well, statistics of,. . . .161 



Higgins, S. W., State Topographer T 



Hillsdale Co. , 81, 88 



Hillsdale, Hillsdale Co 84 



History of Geology in Michigan 6 



Holcroft, John, aid received from, ... .83, 161 



Holland, Ottawa Co., 84 



Horicon L., Wis.,.. 63 



Houghton, Dr. Douglass, explorations of, 



along L. Superior, 6 



appointed State Geologist, , . . . 7 



appointed Boundary Commissioner,. . 10 

 plan of, for connecting linear and sci- 

 entific surveys, 10 



fatal disaster to, 11 



Houghton, Jacob, Jr., information from,. 11 



Hovey , C. E. , aid received from S3 



Hovey & Co. 's plaster quarry 92 



Hubbard, Bela, Assistant State Geologist, T 



Hubbard , Frederick , report of, 9 



Hudson River Group 53 



Huron Co., ..73, 76, 9T 



Huron Group , description of, 71 



economical importance of, 75 



geological equivalents of, 77 



thickness of, 163 



Huronian Series of Logan, 49 



Huron Is., 48 



Huron R. , L. Superior, 47, 49 



Hydraulic limestone , at Drummond's L , . . 56 



in Monroe Co., 60 



Hydrography, .207 



Hydrometer, -179 



I. 



rcMfcyodorwMtei 64 



