WIRELESS TELEGRAPHY.

Dominion, Volume 1, Issue 272, 10 August 1908, Page 9

WIRELESS TELEGRAPHY.

" Hullo !'■-Is tliat' 125 Wireless, LondonP ■This is New speaking." An aerial tele:phoUiVcall like this may bo heard in' the near .future, according to Mr. Valdemar Poulsen, ,who lectured,'at tho London Institution recently on "/Telephoning Without Wires." ..The,progress made in wireless telephony is ;showti in . the. following record of successful "call.f- ---■ ' A phonograph played in Berlin has been - heard by wireless in Lynby, near- Copenhagen,: i!9o'miles distant. A' conversation has been carried on across Denmark from Lynliy to tho other ...-Danish :wireless telephono exchange-'at ■"."Esbjerg," 170 : milcs' away. .Tile production of 'tho music and tho spccch in each caso was clear and distinct, the tuno was unnnstakabloi : arid tho voico was easy to recognise. Tho Qucou.has taken the great,'efet' interest,' in ..those ' wireless, telephone ex.pnni'cnts, which,,wero first successful in 'Dei}-, -mark,-lier nativo land. "A copy of tho .paper • -pi-cpared by Mr. Poulsen was sent to her ,tt Buckingham Palate at hov own. request immediately after the lecture. -Well-known . scientists,officers of- the Army and. Navy, .and City men crowded tho theatre of tho London Institution -to listen to, tho latest news •of this wondor of modom science. Mr/: Valdemar Poulsen, whoso paper was translated and read to tho audicnce,-has mado a. great advanco ! in radio-telephony siuce ho lectured .■last;to- a.London audience two at tho Queen's Hall.: What tvero only'possibilities two years ago have become facts. By tho aid' of a machine, which can bo carried in a travelling trunk, an army or liaval' commander can send messages over la'iid or,sea in his own voico. At tho end of iho lecture the phonographio strains of " Tlio Soldiers' Chorus " and "Tho Trumpeter" wfcro radiated without wires to a telephono box high' up in the building.