Erdgeist (Earth-Spirit): A Tragedy in Four Acts

The New Eschatology Showing the Indestructibility of the Earth and the Wide Difference Between the Letter and Spirit of Holy Scripture.

Ancient Plants Being a Simple Account of the past Vegetation of the Earth and of the Recent Important Discoveries Made in This Realm of Nature

Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place

The Spirit and the Word A Treatise on the Holy Spirit in the Light of a Rational Interpretation of the Word of Truth

Secret Enemies of True Republicanism Most important developments regarding the inner life of man and the spirit world, in order to abolish revolutions and wars and to establish permanent peace on earth, also_ the plan for redemption of nations from monar