Early SDA 
Writings of Adventist church pioneers Ellen White, William Miller, and Joseph Bates available for perusal and downloading. The emphasis is on the original 1858 Great Controversy Between Christ and His Angels and Satan and His Angels.
http://www.earlysda.com/Seventh-day Adventist Bible Prophecy Books of 19th Century
Full text of "The Prophecies of Daniel and the Revelation" and "Modern Spiritualism" by Uriah Smith. "On The Throne of Sin: Spiritism and the Nature of Man as Related to Demonism, Witchcraft, and Modern Spiritualism" by Charles M. Snow.
http://ourworld.compuserve.com/homepages/clt4
The Time of the End
Early 20th century Adventist teacher, author, philosopher, George McCready Price shares his views on the end time (eschatology) in this volume.
http://www.gospel-herald.com/price_gm/toe_index.htm
1888 Message Study Committee
Original 1888 message articles by A.T. Jones, E.J. Waggoner, and Ellen G. White, as well as contemporary writers. Includes a listing of future conferences and seminars, study group activities, and news from around the world.
http://www.1888message.org/
Universal Justification and the Demise of a Preacher - A. F. Ballenger
Essay by Jeff Reich regarding issues surrounding J. F. Ballenger's new teachings around 1900.
http://www.lmn.org/magazine/169/Ballenger.html
