n6 



THE POPULAR SCIENCE MONTHLY. 



aud with only one element of that the pri- 

 mary principle of all reasoning. This prin- 

 ciple the author finds in the law of non- 

 contradiction, which simply says to system- 

 makers, " Be consistent, or do not contradict 

 yourselves." Obvious as this principle is, 

 we are told that in all ages it has been ac- 

 cepted or rejected alternately according to 

 the exigencies of philosophical speculation, 

 having been nullified by theologians and 

 philosophers from Augustine to Kant. It 

 therefore needs reelucidation, to which Mr. 

 Gill has devoted his volume. The book 

 gives abundant scope for the exercise of 

 philosophical genius, in which its author is 

 not wanting. Our most eminent metaphysi- 

 cians, as Drs. McCosh and Anderson, recog- 

 nize his strong claims as a thinker, and we 

 have no doubt his volume will attract the 

 attention of serious students, and prove a 

 valuable addition to American philosophi- 

 cal literature. 



Military Map of the Indian Territory. 



Compiled by First -Lieutenant E. H. 



Ruffner, of the Engineers. 



This valuable map, the preparation of 

 which lias occupied Lieutenant Ruffner and 

 Mr. Ado Hunnius, draughtsman and en- 

 graver, for some three years, is based on 

 Government and railroad surveys, previous- 

 ly-published maps, military surveys and 

 reconnoissances, etc. The scale is made 

 large enough for marching-purposes, and 

 the topographical details are such as are 

 needed in directing military movements. 

 The task of compiling such a map as this 

 of the Indian Territory is one that involves 

 an enormous amount of labor, and it ap- 

 pears to have been performed with consci- 

 entious fidelity by Lieutenant Ruffner. The 

 draughtsman's work is also deserving of 

 great credit. The map is on the scale of 

 1 : 500,000. 



We have received the initial number of 

 The Home Scientist, published at Wads- 

 worth, Ohio. The Home Scientist is a month- 

 ly, eight-page journal, in quarto, devoted to 

 the diffusion of popular scientific knowledge. 

 This first number, both in its original and 

 in its selected matter, shows evidence of 

 competent editorship. We wish it success. 

 J. A. Clark, publisher. Terms, $1 per an- 

 num. 



The Polytechnic Review. We have 

 received from the publishers the first num- 

 ber of a monthly periodical bearing the 

 above title. In form it is a large quarto of 

 twelve pages, tastefully printed on fine pa- 

 per. The Review is designed to chronicle 

 and illustrate the progress of science as ap- 

 plied to the useful arts, such as engineering 

 in all its branches civil, mechanical, naval, 

 military, and sanitary; gas and water sup- 

 ply, and sewerage; chemical technology, 

 with particular reference to mining, metal- 

 lurgy, and manufacturing chemical indus- 

 tries ; manufactures in general, and the me- 

 chanic arts. That the Polytechnic Review 

 will be conducted with energy and ability, 

 the names of the editors, William H. Wall, 

 Ph. D., and Robert Grimshaw, Ph. D., are a 

 sufficient guarantee. Philadelphia: Pub- 

 lished by the editors, 119 South Fourth 

 Street. $3 per annum. 



PUBLICATIONS RECEIVED. 



Geological Survey of Alabama. Report 

 of Progress for 1875. By Eugene A. Smith, 

 Ph.D. Montgomery, Alabama, 1876. Pp. 

 212. 



Memoirs of the Peabody Academy of 

 Science, vol, i., No. iv. Fresh-Water Shell 

 Mounds of the St. John's River, Florida. 

 By Jeffries Wyman, Salem, Massachusetts. 

 Pp. 87. 



Statistics of Births, Marriages, and 

 Deaths, in the City of Philadelphia for the 

 Year 1874. Compiled by William H. Ford, 

 M. D. Philadelphia, 1875. Pp. 133. 



Experiments with the Alleged New 

 Force. By George M. Beard, A. M., M. D., 

 New York, 1876. Pp. 28. 



Report of the Health-Officer of the City 

 of Oakland, California, 1875. By George E. 

 Sherman, M. D. Oakland, 1876. Pp.32. 



Reports of the Trustees and Superin- 

 tendent of the Butler Hospital for the In- 

 sane, Providence, 1876. Pp. 37. 



Immobility or Closure of the Jaw, with 

 Report of Cases. By W. F. Westmoreland, 

 M. D. Atlanta, Georgia, 1875. Pp. 10. 



The Public-School Question as under- 

 derstood by a Catholic-American Citizen 



