Journal of Applied Microscopy. 319 



book into a copy press, leaving a projection of two inches for 

 the attachment of the centrifuge, with perfect success. The 

 next step in the process of evokition is illustrated by the 

 accompanying diagram. Two three-inch carriage bolts', an 

 old book, 20 X 14 X 2 cm., and a block of wood of equal dimen- 

 sions, are the requisites. These are fastened to 

 the edge of the work-table T, the book B projecting \fAf^t^-~^ 

 6 cm., the block W being clamped transversely '"' F^ '"^ "^ -^ ^ 

 over the book with the bolts B, which come on each j / 



side of the latter. Washers under the heads of the 

 bolts insure greater stability. By this arrangement 



the urine attachment cannot be heard in the next room, and the sound_[^from 

 the hematokrit about equals that of an electric fan. wm. krauss, m. d. 



Instructor in Pathology, etc., Memphis Hospital Medical College. 



Editor Journal of Applied Microscopy : Hartford, Conn. 



Dear Sir : In the next number of the Journal, kindly give a list of works which give the 

 best methods for mounting, treating, etc., different objects — a series of directions such as Dodge 

 gives in outline in his Elementary Biology. Please name also the best work on the Microscope 

 and Botany, giving technical instruction, and oblige, A Subscriber. 



Helpful Books in Microscopic Botany. — The following brief list of 

 books, prepared at the request of the editor, makes no pretense to being com- 

 plete, but is thought to contain the titles and sufficiently clear descriptions of 

 several manuals which will be of material assistance to those amateur workers 

 in microscopic botany who have not had an opportunity to receive laboratory 

 instruction : 



Strasburger. Handbook of Practical Botany The character of this indispensable 

 for the Botanical Laboratory and Private i • u 4. u u i. ^ r 



Student, translated by W. Hillhouse, New "^^"^^ '^ best shown by extracts from 

 York, published by Macmillan ; $2.50, 2d the author's preface: "This book is 

 edition, revised 1897, 425 PP- 1 16 figs. intended chiefly for those who, without 



desiring to become botanists by profession, wish nevertheless to become 

 acquainted with the elements of scientific structural botany. It will likewise 

 introduce the beginner to the various methods of microscopical manipulation." 

 " The objects for study have been so selected that most can be obtained with 

 comparative ease." "The list of necessary reagents will be found at the end of 

 the book." " The method of preparation of special reagents for histological 

 work is also given in this list." " The explanations and illustrations of the use 

 of the instruments and reagents are scattered in the text ; but the general index 

 is made so far complete as to enable the student easily to refer to any explana- 

 tions which may be necessary." " All the figures in this work have been drawn 

 from nature. Almost all of the facts given in the text, even those which were 

 well known, have been submitted to careful control. At the close of each chap- 

 ter are given some bibliographical notes, which show the student the fountain- 

 head whence fuller information can be obtained." The manual is divided into 

 thirty-two chapters including among other topics treated the use of the micro- 

 scope, cell contents, movements of protoplasm, the various plant tissues, fibro- 



