134 



THE POPULAR SCIENCE MONTHLY. 



their individual prerogatives combined into 

 a single authority. 



The third edition of Prof. Simon Henry 

 Gage's manual of The Microscope and His- 

 tology has been entirely rewritten, enlarged, 

 and more fully illustrated; and, while ele- 

 mentary matters have received fuller treat- 

 ment than in previous editions, special effort 

 has been made in this to give more adequate 

 accounts of certain apparatus which are 

 coming to be used more and more in the 

 higher fields of investigation in pure science 

 and in practical medicine. In order to en- 

 courage students to do their own work, exer- 

 cises illustrating the principles of the micro- 

 scope and the methods of employing it have 

 been made an integral part of the treatise. 

 To this branch of the subject the volume 

 now before us, constituting Part I of the 

 work The Microscope and Microscopical 

 Methods is largely devoted. (Printed and 

 for sale by Andrus & Church, Ithaca, N. Y. 

 Price $1.) 



In the report of Mr. Tlieodore B. Corn- 

 stock, On the Geology and Mineral Resources 

 of the Central Mineral Region of Texas for 

 1890, about a thousand miles are added to 

 the area given in the previous report as that 

 of the pre-carboniferous rocks comprising 

 the regions described, Silurian and Cambrian 

 strata having been discovered in fields that 

 were supposed to be covered by the Creta- 

 ceous. In order to give special prominence 

 to economical results, the outline of the 

 stratigraphy introduced is prepared with the 

 primary object of affording a kind of key to 

 those whose practical needs preclude the task 

 of selecting from the mass of technical de- 

 scription the particular details which apply 

 to individual cases. For the benefit of the 

 same class of persons a most useful series of 

 directions are given for finding in the re- 

 port at once the information concerning the 

 reader's particular locality, by the aid of 

 which he may judge what method of develop- 

 ment may be most economical and profitable. 



Part II of the fourth volume of The 

 Journal of the College of Science, Imperial 

 University, Japan, contains seven papers, 

 five of which are by Japanese authors, while 

 one is a joint production. They are On some 

 Fossil Plants from the Coal-bearing Series 

 of Nagato, and On some Cretaceous Fossils 

 from Shikoku, by Matajiro Yokoyama ; Com- 



parison of Earthquake Measurements made 

 in a Pit and on the Surface Ground, by 

 Prof. S. Sekiya ; Laboratory Notes, by Prof. 

 C. G. Knott ; Diffraction Phenomena pro- 

 duced by an Aperture on a Curved Surface, 

 and Effect of Magnetization on the Perma- 

 nent Twist of Nickel Wire, by H. Nagaoka ; 

 and On Certain Thermo-electric Effects of 

 Stress in Iron, by Prof. Knott and S. Kimura. 



Edward Fliigel's study of Thomas Car- 

 lyWs Moral and Religious Development is 

 published in a translation by Jessica Gilbert 

 Tyler, by M. L. Holbrook & Co. The main 

 object of the book is defined by the author 

 to be to consider Carlyle as a moral force. 

 Before turning attention, however, to his 

 moral and religious views, a brief considera- 

 tion is given to the history of his inner life, 

 especially with reference to its moral and 

 religious side. In this sense chapters are 

 given among the others to Carlyle's Belief, 

 his Relation to Christianity, his Position with 

 Reference to Science, and especially to Phi- 

 losophy, to Poetry, and Art, his Attitude to- 

 ward History, and his Ethics. 



A series of articles upon the trees of 

 Salem, Mass., and its neighborhood, pre- 

 pared by Mr. John Robinson, in 1890 and 

 1891, for one of the newspapers of that city, 

 have been published by the Essex Institution 

 in book form under the title of Our Trees. 

 They give a popular account of the trees in 

 the streets and gardens of the city and of the 

 native trees of Essex County, with the loca- 

 tion of the trees and historical and botanical 

 notes. They were written wholly with an 

 eye to popular entertainment and instruction, 

 but prepared with considerable care and a 

 regard to scientific accuracy. In them we 

 have accounts of the character of the mag- 

 nolias, tulip tree, lindens, tamarix, sumachs, 

 horse - chestnuts, maples, locusts, apples, 

 pears, cherries, dogwoods, tupelo, witch- 

 hazel, ashes, catalpa, sassafras, elms, box- 

 tree, mulberries, buttonwood, walnuts, hick- 

 ories, birches, hornbeams, chestnut, beech, 

 oaks, willows, poplars, pines, spruces, fir, 

 hemlock, larches, cedar, gingko, and yew. 

 One hundred and fifteen species grow in the 

 region, of which fifty-six are natives of Essex 

 County. 



A collection of papers on the Quaternary 

 Geology of the Hudson River Valley is in- 

 tended as a preliminary contribution by Mr. 



