60 The Microscope. 



the report of Dr. Taylor, microscopist to the Department. Here is 

 found the record of his apparently successful search for means of 

 differentiating the various fats and their crystals with a view to the 

 detection of fraud under the new butter laws. As an endorsement 

 of the valuable work done, Commissioner Colman says: "In conse- 

 quence of the development of these new facts, two convictions have 

 been made during the past month, by two distinct juries of the Crim- 

 inal Court of the District of Columbia, for violation of the butter 

 laws." An excellent litho-caustic plate of butter- crystals is attached. 

 The doctor also has articles on "Textile Fibres," "Parasites in 

 Domestic Fowls," "Edible Mushrooms of the United States." This 

 latter is quite exhaustive, and urges the importance of extending 

 our food resource in this direction. 



An Experimental Study of Mycotic or Malignant Ulcerative Endo- 

 carditis. T. Mitchell Pmdden, M. D: Reprint. 



This monograph will give one a good idea of the important 



work being done in the laboratory of the Alumni Association of the 



College of Physicians and Surgeons, New York. European schools 



have long held a monopoly in this class of work, and we are pleased 



to see such encouraging signs of competition appearing in this 



country. 



Ward's Microscopical Slide Catalogue. 



We have lately seen a system of cataloguing and describing 

 microscopical slides which was contrived and arranged by Dr. E. H. 

 Ward of Troy, N. Y. The plan grew out of the author's exception- 

 ally long and large experience in microscopy, and has been used in 

 essentially its present form for half a dozen years or more. A com- 

 bined serial and alaphabetical catalogue has been so amplified, with- 

 out destroying its convenience as a catalogue, as to render it a very 

 complete record of the character and history of the various slides. 

 By entering in the form such memoranda as may be called for in 

 each case, at the time of preparing the slides, the value of any cabi- 

 net, whether large or small, will be greatly increased, and much time 

 and trouble will subsequently be saved. 



This work has not heretofore been published through the trade, 

 but small editions have been issued by the author at the request of 

 friends who had seen the method in use and who desired to avail 

 themselves of it. The blank forms are issued in books for 1,000 or 

 2,000 objects ; and a few special sets have been prepared in two 

 volumes for cabinets of 4,000 slides, the appendix and alphabetical 

 index being bound separately from the serial list. 



