122 POPULAR SCIENCE MONTHLY. 



as having been carefully prepared, with every detail of substance 

 and illustration faithfully looked after, and as excelling in the 

 quality of making arduous questions understandable to all. He 

 translated into French Gegenbaur's Manual of Comparative Anat- 

 omy, published his Atlas of Zoology, and, studying life at the seaside 

 in his vacations, wrote those charming articles, making his name 

 familiar to readers of all classes, which appeared from time to time 

 in various German popular periodicals. He was commissioned by 

 the Genevan Government to investigate the phylloxera and report 

 upon it. He defended vivisection and charged its opponents with 

 committing the cruelties they denounced. Did they not patronize 

 the stock raisers who mutilated their animals to make them fatter 

 and more pleasant to the taste; and feast on fish which had been 

 tortured in catching; and ride behind mutilated horses? 



Professor Vogt's memoir on the Archaeopteryx is one of the most 

 important documents in the discussion which defined that fossil as 

 marking a notable stage in the transition from the avian to the rep- 

 tilian form. When, in 1880, Dr. Halm speculated on the presence 

 of organic growths in meteorites, Professor Yogt exposed the fallacies 

 of his conclusions; and in a second memoir he and Dennis Monier, pro- 

 fessor of chemistry, showed with proofs from their own experiments 

 that all the essential features of Hahn's meteoric fossils could be arti- 

 ficially produced with inorganic substances. He protested against 

 the extension and predominance of militarism; contended against 

 overloading youth with school duties; advocated a rational system 

 of school hygiene; and opposed the study of Greek and Latin. 



Yogt's Mammals, published at Munich near the beginning of 

 1884, with numerous plates and illustrations, was written in a pleas- 

 ant style, and made most prominent the habits and the geographical 

 distribution of animals. 



The Treatise on Practical Comparative Anatomy was published 

 after eight years of preparation, with the names of Carl Yogt and 

 Emil Yung as joint authors, and acknowledgments to Dr. Jacquet. 



As infirmity began to grow upon him, Professor Yogt tried the 

 injections of Brown-Sequard's elixir, from which he enjoyed a tem- 

 porary invigoration, and described the experiment in the Frank- 

 furter Zeitung. 



The last work he contemplated was a Treatise on the Pishes of 

 Central Europe, which, with the assistance of M. Grote, of Barmen, 

 was to be magnificently illustrated. He did not live to finish it. 



On May 4, 1895, after Professor Yogt had suffered long from 

 insomnia, his doctor gave him an injection of morphine. He at 

 once fell asleep, but never woke, and at five o'clock the next after- 

 noon his heart ceased to beat. 



