Mathematical Handbook

The uses which this book may serve hardly need to be
pointed out. Some years ago the writer composed the part '
relating to Trigonometry and used it as a syllabus for
instruction in his college classes. It served its purpose and
soon went out of print. But a stray copy of it found its
way to the table of a well-known civil engineer, to whom it
proved constantly useful, and by whom it was often referred
to as " his memory."