104 Scientific Intelligence. 



4. Report of the Geological Survey of Iowa, under Pr 

 1 A. White, Vol. II, 444 pp. 8vo. — The first volume of t 

 eport is noticed on page 21*7. The second volume contains aw 



St. John, and reports on northwestern, and the middle region of 

 northern, loM^a, and on the Coal counties, by Professor White, 

 occupying nearly 1 00 pages. Prof. White next treats of the eco- 

 nomical products of the State, exclusive of coal. Then follows 

 the valuable chemical report of Prof. Rush Emery, containing 

 analyses of rocks, coals, peats, etc. Those of coals are numerous; 

 value of the coals, 



they have special reference to the economic! 

 and give the amount of moisture, volatile combustible, fixed car- 

 " )ares the analyses with those of 



1 that the amount of moisture is 



Prof. Emery compares the analyses ^ 

 "■ ■ 1 obs( ' ' 



perhaps a little in favor of the Iowa coals; the amount of ash is 

 almost the same ; that of fixed carbon is largely in favor of 

 Illinois ; while that of the total combustible matter is in favor of 

 Iowa. The volume closes with a table of altitudes, and a catalogue 

 of birds. The volume contains also a colored geological map of 

 the State by Prof. White. 



5. Historical notes of the Earthquakes of JVeto Unglimd, 1638 

 — 1869; by William T. Brigham, A.M., A.A.S. 28 pp. 4to. 

 From tlio memoirs of the Boston Society of Natural History, 



give a list of all I Ik; wtdl authenticated earthquakes that have 

 occurred in Xew England, with such notes as could be gathered 

 from tlie records of tiie time. The number catalogued as having 

 been felt over Xew Enc-land since 168H eighteen years after tne 

 landing of the Pilgrims at Plymouth bay, is 227. Besides these. 

 four earlier ones are mentioned from the ti-aditions of the Indian^. 

 These were distributed through the months as follows: 



Oct., 19; Nov., 29; Dec, 22 ; Jan., 20; Feb., -iG ; Mar., 22.-1^ 

 April, 9; May, 1.3; June, 14; July, 13; Aug., 15; Sept., 10-- '^ 



No month given, , . . v 



A considerable number'of "these 'earthquakes were felt over a i 

 New England, some of them also over Canada, and a few had wki 

 limits. Many of them were comparatively local in their ran£ 

 Three such local regions are deduced by ^sIt. Brigham from ^^. 

 catalogue. These are— 1. A region in Canada, somewhat e V^ 

 cal in form, with the city of Montreal as its western focus. J- ^^ 

 region around the mouth of Merrimack river, in New H'^"^P;V. 

 and Massachusetts and extending to Boston. 3. A veg^n^^ff^ 

 than either of these, around Vew Haven Lyme and East Haddam^ 

 The author mak. s some sn-.a.stions with" n --nrd to the oriil'n ^^ 

 th.- earthqu'ikcs nmnos , t"> 1 ', i .• subiect in full at an 



,ft,.n been prepai^^^'^ 



