1048 



Voltaic Electricity. Section 10: Wireless Telegraphy (Radio-telegraphy). 



NO. 63 siz- 



es 312 A. 1:4. 



63 312 B. 1:4. 



62 329. 1 : 5. 



;/!.. '!!:.'. Portable Apparatus for demonstrating Wireless Telegraphy. Fiys. A and H: comprising 

 a Transmitting Station with Hirhi radiator in polished lock-up wood box 

 230x195x150 mm: and a Receiving Station with .Marconi coherer, a sensitive, adjustable 

 polarised relay, an electric tapper. 2 switches and 1 dry cells, also in polished lock-up 

 wood box L'.'io I'.C, , 15(1 mm 14.0.0. 



( 'iniiplrtr description of the :i|>]>;n:il us -cut on ;i]>)>lic;ilioii. 



(I. 3053, 



3047, 

 30.14, 2619. 



