Ellen White’s statements concerning “amalgamation” are among her most troubling & difficult to understand. Recently I came across a .pdf of a Powerpoint presentation by Dr T. Joe Willey at the Association of Adventist Forums meeting on the 13th of October, 2007; in the Tierrasanta SDA church in San Diego, USA, that examines this issue in some detail. Willey’s presentation is available in .pdf form here. The original webpage raising the issue was For the Gospel.
For those unfamilar with the quotations in question:
“But if there was one sin above another which called for the destruction of the race by the flood, it was the base crime of amalgamation of man and beast which defaced the image of God, and caused confusion everywhere. God purposed to destroy by a flood that powerful, long-lived race that had corrupted their ways before Him.” (Spiritual Gifts, vol. 3, p 64.)
“Every species of animal which God had created were preserved in the ark. The confused species which God did not create, which were the result of amalgamation, were destroyed by the flood. Since the flood there has been amalgamation of man and beast, as may be seen in the almost endless varieties of species of animals, and in certain races of men.” (Spiritual Gifts, vol. 3, p 75.)
This volume was published in 1864 & republished in 1870; though it is no longer being published by an SDA press. It forms the basis for her later “Conflict of the Ages” series.
Willey does an excellent job of locating White’s comments on race within Antebellum culture–focussing more broadly on White’s anthropology as a whole. I highly recommend it.
Other resources on the topic include the less well researched http://ellenwhiteexposed.com/critica.htm; and the White Estate’s official response: http://www.whiteestate.org/issues/faq-unus.html#note-c1-1 The White Estate’s response argues from semantics that White did not actually mean what she says but rather meant something else. It is a quite superficial & inadequate response.