VII. MISCELLANEOUS. 563 



A 7-Bunsen burner lamp. 



Sevenfold lamp. 



Gas blowpipe, provided with stopcock. 



Gas blowpipe, mounted. 



Furnace, containing 25 burners. 



Circular gas furnace, three different forms. 



Absorptiometer. 



Diffusion apparatus. 



Dividing machine for glass gas apparatus. 



Cathetometer. 



Oxy-hydrogen generating apparatus. 



Mercury trough. 



System of convergent lines, etched on glass, for making divi- 

 sions. 



Hydrogen generating apparatus. 



Apparatus for measuring the rapidity with which gases issue 

 through a narrow aperture. 



Spectroscope. 



Spectroscope, provided with micrometer movement for the 'two 

 telescopic tubes, an eccentric movement for the adjustment of the 

 observation telescope, comparison prisms, cross-thread, &c. 



Pocket spectroscope. 



Universal clamp. 



Stand for holding flasks, &c. 



Stand for holding Geissler's tubes. 



Stand for holding carbon points. 



2 stands provided with adjusting screws. 



2 stands provided with three legs. 



3 holders for burettes. 



6 rings of different sizes. 



6 filtering rings of different sizes. 

 2 forks. 



7 clamps. 

 Photometer. 

 Gas-clock. 

 Test-tube holder. 



2 water baths, 2 sizes. 



Apparatus for regulating the level of water. 

 Bunsen's gas regulator. 

 Diying apparatus. 



Apparatus for showing the reversal of the sodium spectrum. 

 Several cases containing chemical substances for practising 

 spectroscopic analysis. 



N n 2 



