Decembee 20, 1901.] 



SCIENCE. 



965 



CONCLUSION. 



The report concludes with a review of the 

 development of agriculture and commerce 

 during the past twenty years, and of the 

 contributions by the Department of Agri- 

 culture to the progress of events and the 

 building up of domestic and foreign trade. 

 The Secretary says that coincident with 

 this growth numerous institutions have 

 grown up in this country and abroad, de- 

 voted to the application of science to the 

 service of agriculture, thus creating a great 

 demand, at good salaries, for the right sort 

 of men. Each nation is seeking to extend 

 its productions, and is depending more and 

 more upon the aid of science. Men com- 

 bining knowledge with practical experience 

 and ability are hard to get, and hence the 

 Department has to face the necessity of 

 paying much higher salaries, or of being 

 compelled to either lose opportunities of 

 getting the best men or to lose some of 

 those who, under its training, have devel- 

 oped such qualities as make them excep- 

 tionally valuable. 



He concludes by saying that he would 

 urge upon Congress, in the strongest terms 

 and for the best interest of the country, 

 such liberality as will enable him to obtain 

 and retain the best men that can be found 

 to fill the important places at his disposal. 



MEMBERSHIP OF THE AMERICAN ASSOCIA- 

 TION. 



The following have completed their mem- 

 bership in the American Association for the 

 Advancement of Science during the month of 

 November : 



Samuel L. Bigelow, Ph.D., Asst. Prof. Chemistry, 

 University of Michigan, Ann Harbor, Mich. 



Thos. A. Chittenden, Instr. in Mechanical Engineer- 

 ing, A. & M. College, W. Raleigh, N. C. 



Patrick B. Delany, Electrician, Inventor, South 

 Orange, N. J. 



Wm. Fox, Asst. Prof. Physics, The College of the 

 City of New York, New York, N. Y. 



Manuel R. Gutierrez, Prof. Physics, Normal School, 

 Calle de las Vietimas, No. 1, Jalapa, Vera Cruz, Mex. 



John J. Hollister, Mining Engineer, Gaviota, Santa 

 Barbara Co., Cal. 



John W. Leonard, Author-Lawyer, Wheaton, 111. 



Wm. L. Martin, Augusta, Ga. 



George H. Maxwell, Chairman, Natl. Irrigation 

 Ass'n, 1827 Phelps Place, Washington, D. C. 



Charles P. Nott, Palo Alto, Cal. 



C. Howard Parmly, Asst. Prof. Physics, The Col- 

 lege of the City of New York, New York, N. Y. 



Wm. B. Potter, Ch. Eng. Ry. Dept. G. E. C, Gen. 

 Elec. Co., Schenectady, N. Y. 



Ferdinand A. Schiertz, Rosario Mines Ltd., Guada- 

 lupe y Calvo, Chihuahua, Mexico. 



Solon Shedd, Prof. Geology and Mining, State 

 Agric. College, Pullman, Wash. 



Dr. Edw. G. Spaulding, Instr. Philosophy, Tlie Col- 

 lege of the City of Mew York, New York, N. Y. 



Dr. Edw. W. Taylor, Instr. Neuropathology, Har- 

 vard Medical School, Boston, Mass. 



Jos. B. Tyrrell, Mining Engineer, 181 Metcalfe St., 

 Ottawa, Canada. 



SCIENTIFIC BOOKS. 



Practical X-Ray Work. By Frank T. Eddy- 

 man, B.Sc. (Lond.), F. I. C. London, Scott, 

 Greenwood & Co. ; New York, D. Van Nos- 

 trand Company. Price, $4.00. 

 This little book, as the name indicates, seems 

 to be a thoroughly practical guide for the be- 

 ginner in X-ray work. As would be expected, 

 the scientific knowledge to be gained by even a 

 careful study of the treatise must be almost 

 entirely empirical. The scope and purpose of 

 such a book quite preclude treating the physics 

 of the subject in any but a statement-of-fact 

 way. 



The work is divided logically into three parts ; 

 the first part, wisely brief, treats of the history 

 of the development of X-ray practice ; the sec- 

 ond, of the apparatus and of its management ; 

 the third, of practical X-ray work. 



It is to be noted that Mr. Eddyman is a phys- 

 icist and presumably trained in the science of 

 the subject ; also that he has charge of the radio- 

 graphic work in a large hospital, and so has had 

 ample experience in the practical application of 

 X-ray diagnosis in surgical and medical cases. 

 Such a combination is almost necessary if one 

 is to prepare a book of real value on this sub- 

 ject. The author seems to have succeeded ad- 

 mirably, giving only enough of the pure physics 

 to make the application of it intelligible, and 



