(45, CORNHILL, E.G., AND 122, EEGENT ST11EET, W., LONDON. 



467 



FIG. 2827. 



2827 



Patent Magnetic Counter. This instrument has been devised for the purpose 

 of counting and registering the periodical movements of any machine, 

 whether rotary or reciprocating. It may be applied either near to or at 

 any distance ; it is less cumbrous than mechanical registeis. No battery 

 is employed, the electric currents being produced by a small armature 

 of soft iron oscillating before the poles of a permanent magnet. 



The Magnetic Counters are made to count to 1,000,000 990 



10,000,000 10 10 



2828 



2829 

 2830 



2831 



FIG. 2828. 



Complete Military Telegraph, in strong oak or mahogany case, 

 with flush metal fastenings, suited for Field Service (fig. 2829) 



Alarm Bell, in oak or mahogany case for use with above . 



Complete Apparatus for the Duplex System, by which these 

 instruments may be worked in opposite directions 

 simultaneously through a single wire. For the Double 

 set from 



Switch on Mahogany Slab 



5 5 



10 



2n2 



