1046 



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



No. 63 302 - 



63 302 A. 1:5. 



63 302 B. 1:8. 



63 305 A. 1 : 7. 



63 305 B. 1:7. 



Wireless Telegraphy (Radio-telegraphy). 



(a) Apparatus for small-scale Experiments. 



63,302. Wireless Telegraphy Demonstration Apparatus, consisting of a Transmitting Station, 

 Fig. A, with radiator and 2 resonators; and a Receiving Station, Fig. B, with coherer. 

 tapper and '2 resonators 



The apparatus is very efficient -it short distances. The spark is generated either liy a Miiall 

 induction coil of 30 50 mm spark length or by an influence machine. One cell is necessary fin- 

 working tin- secondary station. An accurate description i> appended to each apparatus. 



63,305. Wireless Telegraphy Demonstration Apparatus, perfected pattern; consisting of a 

 Transmitting Station, Fig. A, with an oscillator having three spark gaps and two reso- 

 nators; and a Receiving Station, Fi<r. M, with coherer, relax, tapper, _ resonators and 

 terminals for two circuits 



Cl. 3041. 

 3042. 

 3013. 

 3044. 



L s. d. 



2. S. (I 



5. 0. 



