The Microscope. 251 



Staining sections". — According to Zacharias the very finest 

 cellular structures may be rendered plainly visible by coloring 

 them with an ammoniacal solution of carmine, to which a sur- 

 plus of acetic acid has been added, and afterwards allowing them 

 to remain for from two to ten hours in a weak solution of ferric 

 sulphate. This is a very useful method for bringing into view 

 the nuclei of many zoological and botanical objects. The black 

 coloration appears to be quite durable. 



PVBLI CATIONS 



Manipulation of the Microscope. By Edward Bausch. 

 16mo., pp. 128. Second edition. Rochester : The Bausch and 

 Lomb Optical Co. — The first edition of this admirable little book 

 is so well known, and has done so much good service in en- 

 lightening microscopical novices, that scarcely more is now 

 needed than to call attention to the new edition and to the changes 

 made in it. The practical part of the work is not limited to a 

 few pages ; it fills them all. The book contains more important 

 matter concisely explained and intelligently selected than any 

 other elementary work on the subject with which I am acquaint- 

 ed. Mr Bausch has here given the inquiring student just the 

 information that he is anxious to have, and that he will cer- 

 tainly fail to find so well displayed elsewhere. The little book 

 deserves every commendation and is open to not a word of ad- 

 verse criticism. Even the learned microscopist must find in its 

 pages several things that he either never knew or has forgotten ; 

 and to the novice that desires to have some knowledge of the 

 optical parts of his instrument the book can be cordially com- 

 mended. It is written by a man learned in his subject. His 

 remarks are therefore bright and lucid. The changes in the 

 present edition are only those needed to include the advances 

 made since the first was issued. 



5. Druggists Circular. 



