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Waldemar Jungner : ウィキペディア英語版 | Waldemar Jungner
Ernst Waldemar Jungner (June 19, 1869- August 30, 1924) was a Swedish inventor and engineer. In 1899 he invented the nickel-iron electric storage battery (NiFe), the nickel-cadmium battery (NiCd) and the rechargeable alkaline silver-cadmium battery (AgCd). As an inventor he also fabricated a fire alarm based on different dilutions of metals. Worked on the electrolytic production of sodium carbonate. And patented a rock drilling device.〔 (google books link )〕 == Early life == Ernst Waldemar Jungner was born in 1869 in Västra Götaland County, Sweden.〔 His parents were ministers, and his father died when Waldemar was 13 years old. In 1869, the year he was born, failed harvests caused famine throughout Sweden, which affected Jungner's health. He also contracted measles and scarlet fever.〔(【引用サイトリンク】 title=Waldemar Jungner )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Waldemar Jungner」の詳細全文を読む
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