10 CATALOGUE OF PHILOSOPHICAL APPARATUS. 



CABINET XXIV. ELECTROMAGMETISM. 



Compartment C. 

 Thermomultiplier. 

 Two Galvanometers. 

 Compound antimony and bismuth bars. 

 Kuhmkorff's induction coil. 

 Two vacuum tubes for ditto. 

 Model of Electric Telegraph. 

 Rotating wires. 



magnet. 



wheel. 



Horseshoe and bar magnets. 



NobuTs apparatus for obtaining sparks from a magnet. 



Dipping needle. 



Delarive's floating apparatus. 



Wires showing the divergence of a magnetic needle by the influence of an 



electric current. 

 Rotating cylinder. 

 Horseshoe bar of soft iron convertible into a temporary magnet. 



CUPBOARDS FOR APPARATUS. 



No. i to 8. Bottles, jars, retorts, receivers, flasks, mattrasses, crucibles, and 



other miscellaneous articles. 

 No. 9. Large glass receivers, two Liebig condensers, mercurial trough, 



gas furnace with pumice stone to retain the heat. 



APPARATUS ROOM. 



One standard thermometer by Welsh. 



Twenty-four common ditto. 



Three scales of chemical equivalents. 



One portable mountain barometer. 



One furnace for making potassium. 



Stone filter for purifying water. 



Apparatus for drawing up water from great depths. 



