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. In conformity to the Act of the Con s of the United States, entitled An act for the encouragement of learns:i by securing the copies of maps, charts and books, to the authors and proprietors of such copies, during the times therein mentioned and also to an act entitled, An act supplemcn tary to an act entitled, An act tbr the encouragement of learning, by securin the copies of maps, charts and books, to the authors and proprietors of an copies, durin the times therein mentioned; and extending the benefits thereof to the arts designing, engraving and etching historical and other prints.