Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 830
Fig. 35i<^. AllilllltlllllllUUIltllii Fig. 351a elements formerly of interest only to the scientific chemist, and up to thattime devoid of any practical applications. The names of these elements,the oxides of which are called earths, will, of course, be stranq-e to^non-chemical readers, but we…
Inventions
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