Our object is to gather together the conclusions of the scientific world as to primitive man. We wish to see how far back in the geological history of the globe we can find evidence of man’s existence, and we desire to learn his surroundings and the manner of his life. There can be no more important field than for us to thus learn of the past. To read the story of primitive man, to walk with him the earth in ages long ago, with him to wage war on the huge animals of a previous epoch, to recede with him before the relentless march of the ice of the Glacial Age, to watch his advance in culture, to investigate whether there are any races of men now living which are the direct descendants of this primeval man. The author makes no claims to original investigations. He trusts, however, it will not be considered impertinent for a mere loiterer in the vestibule of the temple of science to attempt to lay before others the results of the investigations of our eminent scholars. He has endeavored faithfully to perform this task. As far as possible technical language has been avoided. This is because he has written not for the distinctively scientific men, but rather for the farmer, the mechanic, and the man of business. Constant references are made to the authorities consulted. The reader his a right to know who vouches for the statements made in the text. The pleasantest part of an author’s duty is to return thanks for assistance. After the manuscript was prepared with what care could be bestowed on it, it was determined to submit it to some of our best American scholars for criticism. Accordingly, each of the gentlemen named on the title page were requested to review one or more chapters. As far as possible, each one was asked to review that chapter or chapters for which, either by reason of the position they held, or the interest they were known to take in such subjects, they would by common assent be acknowledged as eminently fitted to sit in judgment. In justice to them, it should be stated that they were not expected to concern themselves with the literary merits or demerits of the manuscript, but to criticise the scientific statements made therein. To each and all of these gentlemen the author would acknowledge his deep obligations.