

I UMK 



NATURAL PHILOSOPHY. 



STAITE'S ELECTRIC LIGHT. 



THE Manchester (Eng.) Courier gives an account of an exhibition 

 of Staite's electric light, in that city, before a committee appointed to 

 inquire into its adaptation for general illumination. The apparatus 

 exhibited was constructed with a view of testing the self-sustaining 

 power of the mechanical arrangement adopted for the continual devel- 

 opment of the light, the sustaining power of the battery, and the cost 

 of the whole. At four the light was set in action, it being understood 

 that it was to burn for five hours and a quarter without interruption, 

 that being the period at which the committee had expressed themselves 

 satisfied that it could be continued for any definite length of time. 

 From four o'clock to six the light continued to burn with increasing 

 brilliancy, giving successively a light, adjudged equal, the first half 

 hour, to 200 candles, at five to 300, at half-past five to 400, and so 

 successively till the electric fluid came into its fullest action at half- 

 past six, when the light, by the instrument used, developed the im- 

 mense number of 700 candles, which intensity of light was steadily 

 kept up till the experiment concluded at a quarter past nine o'clock. 

 Colored prints were brought from the influence of the direct sunbeam 

 to that of the ray from the electric light, in which not the slightest 

 difference of shade of color could be observed. The light of each was 

 then passed through the prism, which still further established their 

 identity, as their point of junction could not be ascertained, thus proving 

 its immense value to the manufacturer and exhibitor of goods. 



PAGE'S ELECTRO-MAGNETIC LOCOMOTIVE. 



Ax experiment of applying electro-magnetism as a locomotive power, 

 was made by Prof. Page, during the past season, on the Baltimore and 

 Washington Railroad. The apparatus used was that perfected by 

 the gentleman making the experiment. The progress of the locomo- 

 tive, when it started, was so slow that a boy was enabled to keep pace 

 with it for several hundred feet. But the speed was soon increased, 

 and Bladensburg, a distance of about five miles and a quarter, was 

 reached in thirty-nine minutes. When within two miles of that place, 

 the power of the battery being fully up, the locomotive began to run, 



