4 MA Z® did the Dyott Expedition up the River of Doubt in Brazil use National Carbon Products What a tribute it is to Columbia’ ever they are used they always prove Radio Batteries that Commander G. M. to be the best, the most powerful and Dyott, British Explorer, chose National the longest lived radio batteries made. Carbon Products for his recent trip to No others can the River of Doubt in Brazil. At one give the same time his broadcasting, sent 300 miles satisfactory reinland from Rio, was picked up clear ception, or and distinct in Greenland over 4,000 ensure ’the miles away. ' s£ne dlrity of H lII® tone as Colum- HBa Seldom are Columbia Radio Batteries bia Radio Bat- Myput to such a severe test; yet wher- teries Factory Representative: ELLIS & COMPANY, LTD., O’Connell Street, Auckland. ©©lwmlbia Madi© Batteries —they last longer 1 Made by National Carbon Co, Inc., Manufacturer* of the famous “American” Flashlight and Columbia Dry Cell*
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Otago Witness, Issue 3830, 9 August 1927, Page 26
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161Page 26 Advertisements Column 1 Otago Witness, Issue 3830, 9 August 1927, Page 26
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