60 ^,y 



SCIENCE 



New Series. "Prtdav AfATfPTT '^1 1 SQQ Single Copies, 15 CTS. 



Vol. IX. No. 222. T KIDAY, iUARCH 61, XOyj. Annual Subscription 



Annual Subscription, $5.00 



"Manipulation of the Microscope" 



A MANUAL FOR THE WORK TABLE AND A TEXT BOOK 

 FOR THE BEQINNER IN THE USE OF THE MICROSCOPE 



By EDWARD BAUSCH 



Bound in Silk Cloth. 200 pp. Price, $1.00 - 



" Manipulation of the Microscope " presents clearly and concisely the 

 essential information regarding the principles, and leads to the intelligent use 

 of the microscope. Beginning with the purpose of the microscope, the parts of 

 the instrument are described in detail, together with the principles involved 

 in their construction, followed by a chapter outlining requisites for work. 

 How to work not only with the microscope, but with its various accessories, 

 is supplemented by a chapter on advanced manipulation. Chapters on how 

 to select and care for a microscope also contain valuable information. 



This book is recommended for the use of students beginning the use of 

 the microscope in any branch of science and especially as a supplementary 

 aid to the instruction usually given. It will also be found a valuable refer- 

 ence book by the advanced Avorker. 



Too often the use of the microscope is begun with little or no knowledge 

 of its construction, what the various parts are for, and their manipulation to 

 obtain the best results. There is also, in very man}^ cases, too great a ten- 

 dency, even in the most advanced laboratories, to undervalue a knowledge 

 of the proper use and care of the microscope. It is a Avell known fact that 

 improper manipulation may easily lead to incorrect deductions, and the 

 microscope will be found a much more obedient and useful servant if the 

 user will only familiarize himself with its mechanical and optical construc- 

 tion and the best way of keeping it in good order. 



BAUSCH & LOMB OPTICAL CO. 



NEW YORK CITY CHICAGO ROCHESTER, N. Y. 



