96 THE AMERICAN MONTHLY [Mar., 



teriological examination proves that unquestionably. — N. Y. 

 Med. Journal. 



MICROSCOPICAL NOTES. 



A. A. A. S. Meeting, 1895. — At a special meeting of the 

 Council, held on January 26th. it was decided to postpone 

 the proposed meeting in San Francisco. An invitation from 

 Springfield, Ma?s., to hold the meeting of 1895 in that city, 

 was accepted. The date of the meeting was fixed as follows: 

 Council meeting, Wednesday, August 28th, at noon; General 

 Sessions, Thursday, August 29th, at 10 A. M. 



NEW PUBLICATIONS. 



Lens- Work for Amateurs. By Henry Orford. 12° 231 pp., 231 

 illustrations. London and Ne.w York, 1895. Cloth- Cover, 80 cts. 



A man who thoroughly understands both the practical and the 

 theoretical phases of lens-making has undertaken with the aid 

 of 231 diagrams to tell us not only how he would perform every 

 step in such work but to give us the mafiematical and 

 other reasons therefor. With the aid of the book, a man of mech- 

 anical capacity many learn to do all such work. The book is 

 primarily, a technological hand-book. Many a young man has 

 served a three to five years apprenticeship in order to learn what 

 he can now buy for eighty cents. With the acquisition of such 

 books relating to the various trades will come a solution of the 

 trades-union difficulty which limits the number of apprenti- 

 ces and seeks to artificially increase wages by reducing tlie num- 

 ber of work-men. 



But the book has a value for every microscopist who wishes 

 to handle his lenses intelligently or who wishes to understand 

 the optics of magnification. All kinds of lenses, condensers, 

 paraboloids, illuminators, eye-pieces, iris diaphragms, camera 

 lucidas, polarizers, and tools for making them are described from 

 the artisan's standpoint. We refrain from saying that the dia - 

 grams appear to be second-hand and badly worn and the lan- 

 guage sometimes fault}'-, because the book is so exceedingly cheap 

 in price and the artisan-auther so capable, so painstaking and 

 a true philanthropist. Microscopists will not need that we tell 

 them to expend 'eighty cents for such a book. 



