Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The cyanide process is a subject comprehending many divi sions, and one that can best be treated along some phase or with a Special point in view. The point in view or purpose of this work is to furnish students, cyanide workers, and those generally and technically interested in the subject, with a practical and technical exposition of the principles and basic practice appli cable to cyanidation in general, and not of the particular practice at any plant or locality. An exposition not too technical and complicated or comprehensive for those who are acquiring or about to acquire their technical equipment, nor too superficial for the experienced operator. Intended primarily to guide the first footsteps and early progress of those who hope to eventually operate plants, the author has used simple explanations and many repetitions and references to other parts of the text in the effort to clarify a subject that is confusing, to say the least, to the beginner. Desiring to produce a work that will be of use in actual practice, rather than something to Simply add to one's technical library, the author has not kept within academic limitations, but has resorted to homely methods of explanation where deemed advisable. Though going into considerable de tail, no branch of the subject has been carried to that point where it should be taken up as a special subject. It aims to lift the careful reader and student to that point where he may in telligently seek' further information in the literature on investi gations into special and abstruse details of the subject, for which purpose and as an aid to the advanced worker an extended Classified Bibliography of the more accessible literature on the cyanide process is included.

The cyanide process is a subject comprehending many divi sions, and one that can best be treated along some phase or with a Special point in view. The point in view or purpose of this work is to furnish students, cyanide workers, and those generally and technically interested in the subject, with a practical and technical exposition of the principles and basic practice appli cable to cyanidation in general, and not of the particular practice at any plant or locality. An exposition not too technical and complicated or comprehensive for those who are acquiring or about to acquire their technical equipment, nor too superficial for the experienced operator. Intended primarily to guide the first footsteps and early progress of those who hope to eventually operate plants, the author has used simple explanations and many repetitions and references to other parts of the text in the effort to clarify a subject that is confusing, to say the least, to the beginner. Desiring to produce a work that will be of use in actual practice, rather than something to Simply add to one's technical library, the author has not kept within academic limitations, but has resorted to homely methods of explanation where deemed advisable. Though going into considerable de tail, no branch of the subject has been carried to that point where it should be taken up as a special subject. It aims to lift the careful reader and student to that point where he may in telligently seek' further information in the literature on investi gations into special and abstruse details of the subject, for which purpose and as an aid to the advanced worker an extended Classified Bibliography of the more accessible literature on the cyanide process is included.