01 A MTIOD OF TRANSLATHG THE CURRENT OF 



A MAGl^ETO-TELEPHONE FROM OIE 



PLACE TO AIOTHER , 



15 Y 



A. C. HISSINK. 



In llic vcrv early «iHys ol' lelepliony, sonie live years ago, 

 il was staled llial Professor Bell's leiephoiie was nul wel! 

 appro|H'iale(l lo Iraiisiuil arhcuiaie speech on greal distances, 

 as Ihere was iio sulficienl electroiiiolive l'orce. Biit gradually , 

 wlieii Ihe arrangemeiils were improved, lliey siicceeded in 

 niaking Ihc telephone a iiiore praclica! inslruuieiit , tlie aclion 

 ol" wiiicli was reüable lor long Unes. 



Il was wilh sucli an improved lelephone , namely Ihe in- 

 slriimenl construcled hy Siemens and Halske ol" Berlin (^) , thal 

 I experinienled on lelegraph wires of 4^4 and ")V2 millimeters 

 in diameier. The earlh was (hen nsed as a relnrn wire,and 

 Ihe resislance of Ihe whole varied helween GOO and 2;>00 

 Siemens^ nnils. 



May il he considered willioul inleresl lo know all Ihe al- 

 lempls 1 made in Ihis \va\ , Ihe grealei- pari of Ihe i'esnlls 

 which I gol heing siniilar lo ihose whieh were ohlained 

 elsewdiere , I however heg lo wrile ahonl a single series of 

 experimenls. hecause Ihey snggesl ;i melhod of Iranslaling Ihe 

 enrrenl of a magnelo-leleplione froni one [ihcv lo anolher, 

 and Ihey seem llnis lo solv(! l/ie jtrohlciii limv lo Inmsinil 

 ARTiciJLATE si'EEcn (il rcii/ iji'enl dislauces. 



(1) Sci' loi' llic (Icscripliim ol' lliis l('l('|tli(Hic: JiiKfiiiil Irlrfjid/ihiiiiic" 

 ilt' Borno. 4i''iMf Vol.. .\ . 14. ]87i). u. ;'.04;3ÜO. 



