Miscellaneous Mathematical Constants is a comprehensive compilation of mathematical constants, originally published in 1873 by Simon Newcomb. The book presents a wide array of constants used in various branches of mathematics and science, including geometry, trigonometry, logarithms, and physics. Each constant is carefully listed with its value and, where applicable, its historical context or method of calculation. This reference work serves as a valuable resource for mathematicians, scientists, and students seeking authoritative numerical values for mathematical and physical constants.