The Violin: Its Famous Makers and Their Imitators. E-book. Formato PDF George Hart   -  Forgotten Books, 2017  - 

For some time I have been in a state of doubt as to which course to pursue — whether to follow the usual custom, and address the reader in a Preface, or to combine my prefatory remarks with a Dedication. It will be seen that I have chosen the latter method. I am aware that inscriptions in connection with books are no longer in vogue; the necessity for them has happily long since passed away. In these free press days, though the writer of a book be the most obscure individual in the paths of literature, yet his pages will not lack readers, always providing they are worth perusal.

Stability in Aviation: An Introduction to Dynamical Stability as Applied to the Motions of Aeroplanes. E-book. Formato PDF George Hartley Bryan   -  Forgotten Books, 2017  - 

Up to the present time the problem of stability has received very inadequate attention in connection with aviation. From the point of view of the practical aviator, this is, perhaps, little to be wondered at. It would scarcely be possible for him to devote months of concentrated attention to long and laborious stability investigations when it is no exaggeration to say that very frequently his success or failure depends, above all things, on the names of the towns at which he starts and lands. If a prize is offered for a flight from Folkestone to Flushing, it is useless for him to fly from Harwich to the Hook, even on a much more stable machine than that used by the winner of the prize.It is hoped that the publication of this memoir will lead to aeroplane stability being made the subject of much more continuous study and investigation than has been possible in the past. A general abstract of the present investigation is contained in the introduction, which may be read with advantage before proceeding to details of a more mathematical character.