...publication. But Dr. Pcttigrew has given his time to these investigations with the ultimate purpose of solving the difficult problem of Aeronautics. To this he devotes...erratic flight of the denizens of the air, are not only anologous, but can be reduced to similar formula. The work is profusely illustrated, and, without reference...

...publication. But Dr. Pettigrew has given his time to these investigations with the ultimate purpose of solving the difficult problem of Aeronautics. To this he devotes...transaction, and will be surprised that the movements o/ bipeds and quadrupeds, the darting and rushing motion of fish, and the erratic flight of the denizens...

...his book. Dr. Pettigrew is confident that man will yet conquer the domain of the air."— -A/. J'. Journal of Commerce, " Most persons claim to know...erratic flight of the denizens of the air, are not only anologous, but can be reduced to similar formula. The work js profusely illustrated, and, without reference...

...Pettigrew is confident that man will yet conquer the domain of the air."— N. K Journal of Commerce. t " Most persons claim to know how to walk, but few could...erratic flight of the denizens of the air, are not only anologous, but can be reduced to similar formula. The work is profusely illustrated, and, without reference...

...publication. But Dr. Pettigrew has given his time to these investigations with the ultimate purpose of solving the difficult problem of Aeronautics. To this he devotes...erratic flight of the denizens of the air. are not only anologous, but can be reduced to similar formula. The work is profusely illustrated, and, without reference...

...publication. But Dr. Pettigrew has given his time to these investigations with the ultimate purpose of solving the difficult problem of Aeronautics. To this he devotes...erratic flight of the denizens of the air, are not only anologous, but can be reduced to similar formula. The work is profusely illustrated, and, without reference...

...purpose of solving the difficult problem of Aeronautics. To this he devotes the last fifty pages of hi« book. Dr. Pettigrew is confident that man will yet...erratic flight of the denizens of the air. are not only anoloerous, but can be reduced to similar formula. The work is profusely illustrated, and, without...

...of hrs book. Dr. Pettigrew is confident that man will yet conquer the domain of the air." — N, y. Journal of Commerce. "Most persons claim to know how...erratic flight of the denizens of the air, are not only anologous, but can be reduced to similar formula. The work js profusely illustrated, and, without reference...

...his book. Dr. Pettigrew is confident that man will yet conquer the domain of the air."— • W. y. Journal of Commerce. "Most persons claim to know how...erratic flight of the denizens of the air, are not only anologous, but can be reduced to similar formula. The work is profusely illustrated, and, without reference...

...of hii book. Dr. Pettigrew is confident that man will yet conquer the domain of the air."— N. y, Journal of Commerce. " Most persons claim to know...erratic flight of the denizens of the air, are not only anologous, but can be reduced to similar formula. The work is profusely illustrated, and, without reference...