Publisher's Synopsis
Excerpt from Refractive Index, Absorption, Wave-Length, Rotatory Power, in Relation to Molecular Structure
It goes without saying that the value Of this index depends not only upon the chemical nature Of the substance, but to a considerable extent also on its temperature and pressure; these, however, can easily be controlled, and it can be said Without exaggeration that the value Of the refractive index, even if accurate only to four decimals, together with the temperature and pressure under which it has been obtained, are much more characteristic for a substance than, say, its Specific gravity, even when measured with very refined means.
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