Melting and Boiling Point Tables, Vol. 1 (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from Melting and Boiling Point Tables, Vol. 1

More than eleven years ago I commenced an investigation with the object of tracing, if possible, any connection there might exist between the chemical composition and the melting and boiling points of inorganic substances. As the data available for this purpose were extremely meagre, the determination of a large number of melting and boiling points of inorganic bodies became necessary, and this again, on account of the high temperatures required, necessitated the invention of new processes for determining these constants. The results of these investigations, together with the theoretical conclusions deduced therefrom, were published (partly in conjunction with Professor Carleton Williams) in the Journal of the Chemical Society of London, in the Philosophical Magazine, and other periodicals. The work, however, soon, became so extended as to include organic as well as inorganic substances, and it was with the object of obtaining data for as complete an investigation of this subject as possible, that the compilation of the present tables was commenced. This compilation, which has already taken eight years of almost continuous labour, was in great part completed without any intention of publication, and it was only after the work had been on hand for some years that publication was ultimately decided on.

As is well known, two of the most characteristic properties of substances are the temperatures at which they melt and boil, and indeed, as regards organic compounds, are those properties by means of which these bodies are most easily recognised and their degree of purity ascertained. They are, therefore, almost always the properties to which the chemist first directs his attention when dealing with a new or unknown compound, and their determination consequently becomes of the greatest importance for both theoretical and practical purposes.

It therefore appeared probable that the publication of the enormous mass of data, which had been collected in the Tables, would be a great convenience to chemists, and especially to those working with compounds of carbon. This is more particularly the case, as the data referring to many comparatively rare compounds are extremely difficult to find, whilst those relating to the same substance not unfrequently vary between somewhat wide limits, so that it is very desirable to have all the available data tabulated for comparison, accompanied by references to the original papers.

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