MAWSON & SWAN, 



ELECTRIC CLOCKS. 



Electric Clock, as illustration above, to be worked from a Normal 

 Clock, with glass face for the lecture table, 3 35. 



Various other patterns for house use, public institutions, factories, &c., pro- 

 cured to order. We undertake also the fitting up and supply of the Regulator 

 Clock, and shall be glad to furnish any information upon application. 



Clocks, Tell-tale, or Watchmen's Recorder, constructed to show on a 

 sheet of paper the time and number of the watchman's visits 

 to the various stations he has charge of. 



Clock and Instrument for six stations - 24. 

 Each extra station, 



ELECTRO-MAGNETISM. 



Electro-Magnet, with Armature, length of arms, 3 in. 26, 4 in. 4/-, 

 $1 in. 76, 6J in. 12/6 ; large size, very powerful, 21 /- 



Electro-Magnet, 9-in. arms, with li-in. core, mounted in a wooden 

 frame 3 ft. high, with scale pans for weights, ^4 45. 



Electro- Magnets of any kind made to order. 



13 and 15, Mosley -street, Neivcastle-on-Tyne. 



