Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 458
Fig. 211.—Iceland Spar showing Double Refraction- 4o8 LIGHT. … CAUSE OF LIGHT AND COLOUR. T^rE have hitherto limited ourselves to a description of some of the * phenomena of light, without entering into any explanation of theirpresumed causes, or without making any statements concerning the natureof the agent which produces the phenomena. Whatever this cause…
Inventions
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