138 



THE AMEKICAN MONTHLY 



[July, 



known about it. Our opinion is, 

 that all the evidence in support of 

 the genn theory, is purely of a ne- 

 gative kind. 



— Dr. J. Pelletan, the editor of the 

 Journal de Micrographie, has fa- 

 vored us with a notice in his num- 

 ber for January, 1880, which we 

 feel bound to correct. He is in er- 

 ror when he writes that we an- 

 nounced sur le ton de la plus 

 grande jubilation that the Journal 

 de Micrographie was dead. We 

 certainly had reason to think that 

 Dr. Pelletan's journal was dead, 

 for the numbers which he promised 

 to issue in September, did not reach 

 us until some time in February or 

 March of the present year. This 

 fact, in connection with certain ru- 

 mors from European sources and 

 our personal experience with Dr. 

 Pelletan in a little matter of busi- 

 ness, led us to infer not only that 

 the journal had closed its carrier, 

 but also that the editor had taken 

 French leave of his creditors. 



We would be much pleased to 

 learn that our information about 

 Dr. Pelletan is incorrect, and we 

 will then gladly make amends for 

 any injustice we may have done 

 him in thought or by words, so far 

 as it lies within our power to do so ; 

 but as the matter stands now we 

 have nothing to withdraw. As to 

 the Journal de Micrographie, we 

 have always mentioned it in high 

 terms of praise, and we were far 

 from feeling pleased when it disap- 

 peared from our exchanges. 



— We hope that all microscopists 

 who can will attend the meeting of 

 the American Society of Micro- 

 scopists, which convenes in Detroit 

 on the 17th of August, and adjourns 

 on the 20th instant, and also the 

 meeting of the sub-section of micro- 



scopy of the A. A. A. S., whioi 

 occurs in Boston on August 25t] 

 as mentioned on page 117. Botl 

 of the meetings will be interesting 

 we have no doubt, but as yet M^e 

 have not been informed what pa- 

 pers are to be read or what business 

 of general interest is to be trans- 

 acted at either of them. In our 

 next number we hope to give our 

 readers some information about 

 those matters. 



NOTES. 



— We notice a new edition (the fourth) 

 of The Microscopist, by Prof. J. H. Wythe. 

 It is a larger book than the former edi- 

 tions, and the price has been increased to 

 $5.00. Several chapters on the use of the 

 microscope in pathology, diagnosis, and 

 etiology have been added, with many 

 wood-cuts. 



— The New York Microscopical Society 

 desires to have a complete list of all the 

 Microscopical Societies in the country, 

 with their post-office addresses. Secre- 

 taries of Societies would cpnfer a favor 

 by sending the desired information to Mr. 

 Benjamin Braman, 117 E. 30th St., New 

 York, who is the Corresponding Secretary. 

 The Society has adjourned for the Sum- 

 mer ; the Fall meetings begin on the third 

 Friday in September. 



— An instrument has been made by 

 Mr. Young, of Philadelphia, designed to 

 describe arcs of a few inches to infinity. 

 It is said that the machine will draw a 

 line " straighter than a straight-edge." 



CORRESPONDENCE. 



GLASS FOR SLIDES. 



To THE Editor : — The article in the 

 April number of the Atnerican Monthly 

 Microscopical Journal, on the subject of 

 cutting and grinding glass slides, was 

 read by me with interest. Will you be so 

 good as to place an inquiry in your jour- 

 nal addressed to microscopists in general, 

 and to the writer of the article named in 



