366 SEC. 10. ELECTRICITY. 



Reversing Switch. 



The British Telegraph Manufactory, Limited. 



Double Plate Lightning Guard. 



The British Telegraph Manufactory ', Limited. 



S. A. Varley's Lightning Guards (two onboard). 



The British Telegraph Manufactory, Limited. 



1576c. Wheatstone's large Dial Indicator, for use with 



ABC instruments. 



The British Telegraph Manufactory, Limited. 



1576h. Double Current Key, for Wheatstone's Automatic 

 Telegraph. The British Telegraph Manufactory, Limited. 



15761. Double Current Key, for Wheatstone's Automatic 

 Telegraph. The British Telegraph Manufactory, Limited. 



1576J. Rheostat for Duplex Telegraphing. 



The British Telegraph Manufactory, Limited. 

 1576k. Testing Key. 



The British Telegraph Manufactory, Limited. 



15761. Testing Key. 



The British Telegraph Manufactory, Limited. 



1576m. Testing Key for Discharges. 



The British Telegraph Manufactory, Limited. 



1576n. Lightning Guard, 



The British Telegraph Manufactory, Limited. 



1576o. Polarised Belay with Wheatstone's Patent 

 Chain Adjustment. 



The British Telegraph Manufactory, Limited. 



1576p. Wheatstone Magnetic Counter with Magnet 

 and Wheel showing Mode of Application. 



The British Telegraph Manufactory, Limited. 



1576q. Magneto-Electric Clock with Steam Engine 

 Movement. The British Telegraph Manufactory, Limited. 



1576r. Wheatstone's Roman Type Printer for use 

 with the ABC Telegraph. 



The British Telegraph Manufactory, Limited. 



1576s. Wheatstone's Portable ABC Telegraph, 

 specially arranged for Military Purposes. 



The British Telegraph Manufactory, Limited. 



1576t. Wheatstone's Alphabetical Magneto-Electric 

 Telegraph. The British Telegraph Manufactory, Limited. 



