864 SEC. 19. EDUCATIONAL APPLIANCES. 



Crushing mortar, with base. Colour plate and support. 



Blowpipe hammer. B. P. cup and wire holder. 



Triple lens. Cupel support and two cupels. 



Single lens. : Set of three watch glasses. 



Coddington lens. | Bunsen's burner and blowpipe jet. 



Magnetic and electric needle in case. I Box powdered glass, 

 chisel. Brass stand. 



Berlin porcelain cups. 



Brass spirit bottle. 



Griffin pastille mould, boxwood, and 



two stampers. 

 Griffin pastille mould, iron. 



Wooden blocks. 

 Set of 100 minerals. 

 Glass case for do. 

 Set of 100 blowpipe minerals. 

 6 Von KobelPs minerals. 



Support for sublimator. 120 fragments minerals. 



Charcoal block and support. 9 Mohr's degree of hardness 



APPARATUS FOR TEACHING CHEMISTRY. 



4093. Working Bench for a Chemical Laboratory, for the 



use of science classes (according to Dr. R. Arendt). 



Franz Hugershoff, Leipzig. 



4094. Hofmann's Electrolytic Apparatus. 



Ch. F. Geissler $ Son, Berlin. 



4095. Hofmann's Apparatus for liquefying sulphurous an- 

 hydride. Ch. F. Geissler fy Son, Berlin. 



4096. Hofmann's Apparatus for determining the greatest 

 density of water. Ch. F. Geissler fy Son, Berlin. 



4097. Hofmann's Electrolytic Apparatus for decomposing 

 hydrochloric acid. Julius Schober, Berlin. 



4098. Hofmann's Apparatus for showing that in the Syn- 

 thesis of Ammonia Gas three volumes of hydrogen unite 

 with one volume of nitrogen, to form two volumes of ammonia 

 gas. Julius Schober, Berlin. 



4099. Hofmann's Apparatus for showing that in the Syn- 

 thesis of Water two volumes of hydrogen unite with one 

 volume of oxygen, to form two volumes of water, gas, or steam. 



Julius Schober, Berlin. 



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

 table. Joh. Lenz, Berlin. 



4101. Hofmann's Apparatus for decomposing Fhosphu- 

 retted Hydrogen. Julius Schobcr, Berlin. 



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



F. A. Wolff $ Sons, Heilbronn and Vienna. 



This distillation apparatus has been specially constructed at a very cheap 

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



