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(1) [[strikethrough]] 46 [[/strikethrough]] CHARLES V. RILEY. [The Gas Treatment Patent.] Pacific Rural Press, July 25, 1891, and September 19, 1891. History of the invention of the Hydroayanic acid gas treatment for Scale-insects; proofs that the discovery was made and perfected by an agent of the U. S. Department of Agriculture, under direction of the author, and that the patent granted to Californian parties was wrongfully obtained; Advises orange growers not to heed it.