Lectures on the unknown god of Herbert Spencer and promise and potency of Prof. Tyndall
By: by George T. Ladd. 
Publisher: I.L. Hauser & Co.
Published: 1900
Place of publication: Milwaukee
Subjects: Spencer, Herbert, 1820-1903.; Tyndall, John, 1820-1893.
Other titles: Promise and Potency of Prof. Tyndall.