316 SEC. 10. ELECTRICITY. 



produced is equal to that from 8-10 Bunsen's elements. The 

 armature is rotated by hand. Siemens and Ifalske, Berlin. 



1336a. Various Examples of Magneto- Electric Appa- 

 ratus. 



Electro-magnetic machine by Gramme, with a Jamin magnet of 

 0'08m. 



Magneto-electric machine, by Gramme, for electric light of 150 

 burners. 



Magneto-electric machine, by Gramme, with electro-magnet for 

 laboratory. 



Magneto-electric machine, by Gramme, with a Jamin magnet 

 (small model). 



Magneto-electric machine, by Gramme, with a Jamin magnet 

 (large model with fly-wheel and treadle). 



Exploder, with Jamin magnet (large model) with bobbin, cable, 

 and key. 



Exploder, with Jamin magnet (medium model). 



M. Breguet, Paris. 



1336d. Magneto-Electric Machine. H. L. Rutter. 



f. OTHER MODES OF PRODUCING ELECTRICITY OR ELECTRIC 

 CURRENTS. 



1337. Apparatus, designed (o obtain electric currents by 

 means of the combined action of gravity and motion. Preliminary 

 experiments only have yet been made with it. 



George Gore, F.R.S. 



1338. Apparatus for investigating electric currents produced 

 by the friction of different metals. (Not yet completed.) 



George Gore, F.R.S. 



1341. Delezenne's Circle. An instrument for developing 

 electrical currents by the agency of terrestrial magnetism. 



Elliott Brothers. 



1342. Apparatus by which Forbes procured an Induction 

 Spark from a Natural Magnet. Trans. R. S. Edin., 1833. 



University of Edinburgh. 



II. APPARATUS FOR REGULATING THE PLACE 

 AND TIME AT WHICH THE EFFECTS OF AN 

 ELECTRIC DISCHARGE OR CONTINUOUS ELEC- 

 TRIC CURRENT ARE PRODUCED. 



1343. Six Specimens of Tubular Binding Screws for 



making electrical connexions. George Gore, F.R.S. 



