Excerpt from Physical Chemistry for Beginners
In delivering in Amsterdam my lectures on Chemistry, chiefly to students of medicine, I was confronted by a double task: on the one hand to present the systematic side of the subject with relative completeness and entirely on an experimental basis, on the other hand to show how the fundamental laws of chemistry might be deduced from these facts. The scheme of presentation which I adopted therefore comprised two topics: the first included the consideration of certain elements, the second was confined to a general summary.
I began with "Matter from a Qualitative Standpoint," water, oxygen, hydrogen, air, and nitrogen supplying me with the necessary material; then came the concepts, compound, mixture, element, and the whole table of atoms; the halogens furnished the material for the second topic, in the course of which the laws governing weight were introduced, and in this manner I continued until the vacation.
This was all very well, but nevertheless a book was required.
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