June 19, 1891.J 



SCIENCE. 



349 



pied in the logic of Aristotle. Professor Hamilton thinks that 

 universal and particular categorical propositions cannot be under- 

 stood, as principles of reasoning and as employed in "mediate 

 inference," unless the one be regarded as expressing a necessary 

 and the other a contingent sequence. Therefore also he explains 

 the pure syllosism by the modal. Moreover, there are modes of 

 reasoning which can be formulated only in modal syllogisms. 

 Logic is the science, not of thouglit simply as such, but of thought 

 as the instrument of rational conviction, and therefore of thought 

 in its relation to metaphysics, which is the science of the nature 

 and laws of things. Some radical modiScations of logical doc- 

 trine have resulted from the thorough-going ai)plication of this 

 principle, and these, it is believed, have added greatly to the in- 

 telhgibility of the science. 



— • Charles Scribner's Sons have in Press " Taxidermy and 

 Zoological Collecting," a new book by William T. Hornaday, 

 for eight years chief taxidermist in the United States National 



Museum It will be copiously illustrated. The book is written 

 in a popular rather than a technical style, and yet when necessary 

 the details of the art of preserving birds, animals, etc., are de- 

 scribed with the utmost precision. 



— With the issue of June 6, Geo. M. Gould, M.D., assumed edi- 

 torial chirge of The Medical News of Philadelphia. In " An In- 

 troductory Word," the new editor says: " Our aim will be to serve 

 as the intermediary for bringing to the busy practical worker the 

 useful results of original medical research, and the concrete lessons 

 of many single rich experiences. A brilliant and striking illustra- 

 tion of such an ideal as we have described very appositely occurs 

 in the present issue of The News : When, from tlie examination of 

 a drop of blood taken from a patient's finger, hitherio unsuspected 

 disease may be diagnosticated, and either a heroic tri-atment that 

 saves life instituted, or a speedily realized fatal prognosis an- 

 nounced, our faith in our science at once rises, and our power over 

 disease is vastly increased." 



Echausfion 



The phosphates of the system 

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 and exhaustion usually indicates 

 a lack of supply. The Acid 

 Phosphate supplies the phos- 

 phates, thereby relievirg exhaus- 

 tion, and increasing the capacity 

 for labor. Pleasant to the taste. 



Dr. A. N. Keotjt, Van Wert, 0., says: 

 ' ' Decidedly beneficial in nervous exhaus- 

 tion." 



Dr. S. T. Newman, St. Louis, Mo., says: 

 ' ' A remedjr of great service in many 

 forms of exhaustion." 



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