Excerpt from Theoretical and Physical Chemistry
Many fundamental principles which apply in all branches of chemistry are given in the first course, but, of necessity, they are presented more or less didactically. Students at that time have so small a knowledge of the facts of chemistry they cannot be expected to understand the full significance of these principles, and they usually forget them quickly. In the sophomore or junior year conditions are otherwise, and at this stage they appreciate a critical consideration of these half-learned, three-quarters forgotten, fundamental principles, and both value and enjoy following the reasonings which lead to others. Such critical studies develop the habit of right thought and tend to diminish the number of those who memorize and recite parrot-fashion but will not think. For these reasons the writer believes a course of lectures in elementary theoretical and physical chemistry should follow the first courses in general chemistry and qualitative analysis.:
This book is intended for use in such a course and is addressed to students who know a little chemistry. It comprises about all that can be advantageously presented in two or three lectures a week through one year, but it is hoped it may be found useful for shorter, courses or collateral reading.
An unfortunate impression has got abroad that much mathematics is needed for a comprehension of physical chemistry; unfortunate, as it deters many who want it, and would profit by it, from electing the subject. No attempt has been made to avoid the use of mathematics, but a perusal of this book will show that ordinary arithmetic and elementary algebra are sufficient, except in five or six demonstrations. One unfamiliar with the calculus must take it on faith that steps in the derivations of half a dozen formul? are correct, and that is all.
Classifications and methods of presentation which have proved satisfactory by their results should not be tampered with unless for clearly good cause. My colleagues will therefore recognize many familiar statements and arrangements in the following pages.
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