at the Jackling group of mines in Utah, Nevada, Arizona, and New Mexico, which introduced their own modified Hyde flotation process—and were sued by Minerals Separation as well. Thomas Arthur Rickard, editor of the Mining & Scientific Press, San Francisco, made Hyde's suit, and the others that followed against Minerals Separation, into a cause celeb, where the firm was described as evil incarnate. Hyde received professional accolades, probably the greatest being during the many talks on flotation, recognizing his primacy, presented at the American Institute of Mining Engineer's conference in Arizona, September 1916. But in the end the Minerals Separation, Ltd would prevail in its many suits until its patent expired in 1923, "and in so doing earned for itself the cordial detestation of many in the mining world." Consultancy During the period between his 1914 court victory and the Supreme Court's negative decision, Hyde's consultant business flourished with work primarily undertaken by him in the silver-lead-zinc mines of Colorado, with a test lab in Denver and in southern Colorado. In 1916-1917, his biggest personal financial failure was on the lease of the Genesee-Vanderbilt group of mines above Silverton, Colorado, and the construction of a flotation mill that failed because of complex ores. (The Butte & Superior ores had been simpler in their composition, fortunate for Hyde's first, 1911-1912, success). Over the next decade, other metallurgists and chemists would solve the problems with new differential flotation, addition of xanthates and other reagents, and additional steps to a continually evolving process that would take more technical skill while exceeding everyone's expectations of utility. By 1917, Hyde had relocated back to Palo Alto and was hired as a consulting metallurgist for the U. S. Bureau of Mines experiment station at Stanford. In 1919, Stanford hired Hyde and his old friend Theodore J. Hoover as faculty in the mining department. Over the next seven years he would teach metallurgy, work in his metallurgical lab, and do a limited consulting business with the Hoover brothers. More and more, his interests leaned to reform and political activities. In 1927, he resigned from Stanford to, officially, return to his consultant work in Mexico and Southern California, but, unofficially, to become more active in Republican politics. As before, some of his mining ventures were suspect, including an attempt in 1935 to reopen the Good Hope Mine in Riverside County. A state inquiry was held in 1935 on