IV. LABORATORY APPARATUS. 635 



This apparatus consists of a hemispherical chamber or vessel into which a 

 jet of coal gas is discharged at a tangent carrying with it a certain proportion 

 of air which by eddying round within the chamber is ultimately mixed with 

 the gas. The mixture escapes by a short tube in the middle of the chamber, 

 and burns with an amber flame containing a brilliant green cone within it. 

 This cone is a hollow space in the flame in which the head of a lucifer match, 

 if dexterously inserted, will not ignite. The flame above will readily melt 

 gold, silver or copper, indicating a temperature equal to about 3000 Fahr. 



2740. Chemical Apparatus, Photometrical and Gaso- 

 metrical Apparatus, Lamps, &c., invented by Professor 

 Bunsen, of Heidelberg, and described by him in his " Gasometrical 

 Methods," and other publications. C. Desaga, Heidelberg. 



Spirometer. 



Goniometer. 



Galvanic battery, consisting of four elements. 



Table blowpipe lamp, with 2 jets. 



A 6-Bunsen burner blowpipe table lamp. 



An 18-Bunsen burner blowpipe table lamp. 



Oxy-hydrogen blowpipe. 



Iron tripods, four different sizes. 



Small tripods for fixing on lamps. 



Small tripods for spreading out the flame. 



Electrometer. 



Bunsen's water vacuum pump. 



Air-pump plate. 



Spark-producer. 



24 compression clamps of different sizes. 



Potash apparatus. 



4 supports for flasks, &c. 



Apparatus for cooling (condenser). 



Bunsen gas burners, 18 different sorts. 



Babo's lamps, five different kinds. 



Breitenlohner's lamp. 



Lamps with double and treble air draught. 



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. 



