72 Scientific Intelligence. 
annual reports to the Board published in 1892. The second 
report contains a careful compilation of the notes made by the 
late Mr. C. E. Wright, when state geologist, of the borings in 
various parts of the state; and the thickness and basin-like struc- 
ture of the whole paleozoic series of southern Michigan, from the 
Trenton upward, is graphically shown in the sections. The fol- 
lowing section and thicknesses are based chiefly upon borings at 
Jackson and Monroe. The names are those given to the forma- 
tions by the authors. 
Quaternary... 2. 2222 S22 Ea oa Ont 
WV oodvalle.sdsti 4.2 aye eee ee 304. + | 
Jackson coal group ---------- Wi ae. | 
arma? edst. 2..\ok Sis aaa 0-200. }=Carboniferous. 
Grand Rapids group .---.---- 305 + | 
Marshall sdst. 22... 25:2 50 + J 
Coldwater shales __.-..._-... 667-1000 + Coen Al 
Black bituminous shale___..-- : — ae ane an 
Richmondville or Berea sdst. - - 65 See ee 
Huron (15 ft.) or St. Clair black : 
Shales... |. i... 2 ee eee 145-300. | a : 
Traverse eToup) 127 See eee 100-600. f mage 
Dundee limestone ._..___.___-- 40-160. J 
Mamnroe beds). 4222 9228 rey. 650-2000 
Nidwera ...<)) 4s ae PURE 350 | Sui 
Med tai) ye gt BER est Sey ae 100. 
Phadson: River eee eee 490. 
Witla: cae ne a 80. + = Lower Silurian. 
‘Prenton..2. > - 2a fare ae area f@ 
These measurements show a considerably greater thickness than 
has been given in previous estimates by either Winchell or 
Rominger, especially in the Coal Measures and the Upper Silurian 
strata, H. S. W. 
2. The Geological and Natural History Survey of Minnesota. 
N. H. Wincue 1, State Geologist.—The following three reports 
of this survey have recently been received, viz: The Geology of 
Minnesota, vol. wii, part I of final report. Paleontology, by 
Leo Lesquereaux, Anthony Woodward, Benjamin W. Thomas, 
Charles Schuchert, Edward O. Ulrich, Newton H. Winchell, pp. 
a—-lxxv, 1-474, 41 plates and 84 figures, Minneapolis, 1895. 
22d Annual Report for the year 1893, pp. 1-210, Minneapolis, 
1895. 23d Annual Report for the year 1894, pp. 1-255, Minne- 
apolis, 1895. 
Part I of the Paleontology was communicated to the Secretary 
of State in 1891, and the several chapters of which it is com- 
posed have already appeared as separate brochures, and may 
have been examined already by many of our readers. The pub- 
lication of these separate memoirs in this permanent form consti- 
