1036 SEC. 19. EDUCATIONAL APPLIANCES. 



4100. Hofmann's Steam Generator, for the lecture-room 

 table. E. A. Lentz, Berlin. 



4101. Hofmann's Apparatus for decomposing Phosphu- 

 retted Hydrogen. Julius Schober, Berlin. 



4102. Distilling Apparatus, for the use of science classes. 



F. A. Wolff" fy Sons, Hcilbronn and Vienna. 



This distillation apparatus hag been specially constructed at a very cheap 

 rate for the use of science classes, to illustrate distilling operations. 



4103. Diagram, showing elevation, section, and plan of a 

 working-bench in the Laboratory of the Strasburg University. 



Chemical Institution of Strasburg University. 



4104. Photographs of a portion of tlie principal room of the 

 Laboratory belonging to the Berggewerkschaft Association of 

 Miners at Bochum. 



Bcrggewerkschaftskasse, Bochum, Rhenish Prussia. 



4105. Hofmann's Apparatus for showing the simultaneous 



Decomposition of hydrochloric acid, of water, and of ammonia. 



Julius Schober, Berlin. 



4106. Hofmann's Apparatus for showing the Constancy of 



the Proportions in the combination of hydrochloric acid gas 

 with water. Julius Schober, Berlin. 



4107. Hofmann's Apparatus for showing the Synthesis of 

 Water. Julius Schober, Berlin. 



4108. Hofmann's Lecture Room Eudiometer. 



Julius Schober, Berlin. 



4109. Hofmann's Apparatus for demonstrating that the 

 volumes of oxygen which enter into the composition of carbon and 

 sulphur dioxide are equal to the respective gas volumes of these 

 compound gases. . Julius Schober, Berlin. 



41 10. Hofmann's Apparatus for illustrating the Phenomena 

 of Combustion. Julius Schobcr, Berlin. 



4111. Models from Mitscherlich's Chemico-technical 

 Collection, representing 



(1.) A puddling furnace. 

 (2.) A coke oven. 



The lower part of a blast furnace. 



Prof. A. Mitscherlich, Miindcn. 



26O4. "Warmbrunn, Quilitz, and Co.'s Large Glass Gas 

 Holder, described by R. Miincke in Dingler's Polyt. Journ., 

 vol. 218, p. 40. Warmbrunn, Quilitz, $ Co., Berlin. 



