960 



Voltaic Electricity. Section 6: Electro-magnetism and Electro-dynamics. 



X<>. -' 340 



62 347. 1 : 3. 



62 349. 1 : 3. 



62 346. 1 : .V 



62,340. Morse Telegraph for instruction purposes, F i g u r e 



2 stations together 



s. (1. 

 I). 111. 



On a polished stand are conveniently arranged the Morse Apparatus with clockwork under glas, 

 the key, a porcelain insulator and a cell, and provided with different coloured leads. By this arrange- 

 ment and the employment of two stations the understanding is aided considerably in following the 

 processes of telegraphing. 



62.341. Morse Telegraph for instruction purposes as preceding, without clockwork, for rotating 



with the hand by means of wheel gearing. 2 stations together 5. '0. 



62.342. Morse Telegraph, as No. 62,340, each station with relay for open circuit and provided 



with 2 cells. 2 stations together ' 10. 0. o 



62.343. Morse Telegraph, as No. 62,341, each station provided with relay for open ciicuit and 



with 2 cells. 2 stations together ' 8. 10.0 



61,147. Morse Key, Figure on p. 868, fitting apparatus Nos. 62,32462,327 (Gan.-Mau. 



Fig. 846; Gan.-Rein. Fig. 927) 0.10.0 



62.34-1. Morse Key, large pattern 1. o.o 



Morse Keys for heavy current; see "Radio-telegraphy" Section. 



62, .'545. Polarised Relay, Figu re, in metal case with glass lid, for telegraph purposes, for 



open or closed circuit current '. 3. 0. 



(J2.346. Polarised Relay, highly sensitive 1 . Figure, with resistance of approximately 



7000 ohms, chiefly for wireless telegraphy, for open or closed circuits !). 0. 



62.347. Relay, Figure, very comprehensively arranged, can be used on closed or open 



circuits (cf. Can. -Man. F'ig. 853; (lan.-Kein. Fig. !28) 2. '8.0 



62. 3 IN. Polarised Relay, simple, with adjustable sensitivity, resistance l.'iO ohms, in walnut 



case, for closed or open circuit working. Figure 1 . o. 



Cl. 20'JO, 5832, 59'', -'-'.', 

 -'824, 58 ''.31150. 



