904 



Voltaic Electricity. Section 3: Electro-Magnetic Current Measurements. 



No. 61532 



61534. 1:6. 



61 562. 1 : 5. 



61 572. 1 : 6. 



61 563. 1 : 5. 



61565. 1 :/>. 



61 570. 1 : . 



Electromagnetic Soft Iron Demonstration Ammeters for Direct or Alternating Current, with 

 Air Damping, Fig. 61,534, with moving system (can be taken out), in glass ease: 



Range 



For A. C. 



\ List No. 

 I Price 



Electromagnetic Soft Iron Demonstration Voltmeters for Direct or Alternating current, with 

 Air Damping, cf. Fig. 61,534, with moving system (can lie taken out), in glass case. 



Eange 0.53 16 



For 

 A. C. 



210 525 20 100 30 150 40 200 50 300 volts 



61,546 61,547 61,548 61,549 61,550 61,551 



Pri> 4. 15. 4. 15. 4. 15. 4. 15. 4. 10. 4. 10. 4. 15. 4. 18. 



List No. 61,552 61,553 61,554 61,555 61,556 61,557 61,558 61,559 



Price 4. 18. 4. 18. 4. 18. 4. 18. 4. 13. 4. 13. 4. 18. 5. 0. 



For I List No. 61,544 61,545 



D.C.I 



Apparatus Nos. C>1,532 <>1. fi.V.I are const ructed as in most electromagnetic instruments, on the 

 principle of the repulsion of two magnetized soft iron pieces of the same name. 



The frequency should be quoted in the case of A. C. instruments. I'nless tlii.s is stated instruments 

 are supplied calibrated lor 5(1 periods. 



HI. 560. Reduction in price if the moving system of Nos. 61,532 61.55!t is not rei|iiired to be 



made withdrawable .............................. 0. >. 



61.561. Extra price for subdividing the series resistance for Voltmeters Nos. <;!.."> 1 1 ill. .V.'.i 



for obtaining a second range of higher sensitivity. The two ranges must he as I : 2 d. is. n 



; 1.562. Demonstration Instrument after Scotti, for explaining the principle of hot wire in- 



struments. Figure, on stand, for projection. NEW! ............. 1- Id. < 



Cl. 241!), M35, 2428, 

 -M .'.'.. '.M'-'li, lM-.'7. 



