صور الصفحة
PDF
النشر الإلكتروني

0

A HISTOKY OF

THE THEOKY OF ELASTICITY

AND OF

THE STEENGTH OF MATEEIALS

FROM GALILEI TO THE PRESENT TIME.

BY THE LATE

ISAAC TODHUNTER, D. Sc., F.R.S.

EDITED AND COMPLETED
FOB THE SYNDICS OF THE UNIVERSITY PRESS

BY

KARL PEARSON, M.A.

PROFESSOR OF Applied MATHEMATICS, UNIVERSITY COLLEGE, LONDON.

VOL. I. GALILEI TO SAINT-VENANT
1639—1850.

CAMBRIDGE:
AT THE UNIVERSITY PRESS.
1886

[All Rights reserved.]

[graphic][merged small]

TO THE MEMORY Of

M. BARRE DE SAINT-VENANT THE FOREMOST OF MODERN ELASTICIANS THE EDITOR DEDICATES HIS LABOUR ON THE PRESENT VOLUME.

Si ces imperfections sont malheureusement nombreuses, cela vient de ce que la science appliquée est jeune et encore pauvre; aveo ses ressources actuelles, elle peut déjà rendre de grands services, mais ses destinées sont bien plus hautes: elle offre un champ immense au zèle de ceux qui voudront l'enrichir, et beaucoup de parties de son domaine semblent même n'attendre que des efforts légers pour produire des résultats d'une grande utilité.

Saint-Venant.

Jedenfalls sieht man aus den angefûhrten Thatsachen, dass die Théorie der Elasticitat noch durchaus nicht als abgeschlossen zu betrachten ist, und es ware zu wunschen, dass recht viel Physiker sich mit diesem Gegenstande beschaftigten, um durch vermehrte Beobachtungen die sichere Grundlage zu einer erweiterten Théorie zu schaffen.

Clausius.

Ceux qui, les premiers, ont signalé ces nouveaux instruments, n'existeront plus et seront complètement oubliés; à moins que quelque géomètre archéologue ne ressuscite leurs noms. Eh 1 qu'importe, d'ailleurs, si la science a marché!

Lamé.

PREFACE.

In the summer of 1884 at the suggestion of Dr Routh the Syndics of the University Press placed in my hands the manuscript of the late Dr Todhunter's History of Elasticity, in order that it might be edited and completed for the Press. That the publication might not be indefinitely delayed, it was thought advisable to print off chapter by chapter as the work of revision progressed. That this arrangement has accelerated the publication of the first volume is certain, but at the same time it has introduced some disadvantages to which it is necessary for me to refer. In the first place it was impossible to introduce in the earlier crossreferences to later portions of the work; this I have endeavoured to rectify by adding a copious index to the whole volume. In the next place I must mention, that it was not till I had advanced some way into the work that I felt convinced that the reproduction in the analysis of a memoir of the individual writer's terminology and notation must be abandoned and a uniform terminology and notation adopted for the whole book. This was absolutely needful if the book was to be available for easy reference, and not merely of interest to the historical student. The choice, however, of such terminology and notation—considering the enormous diversity, I will even say confusion, on this point to be found in the writings of British and continental elasticians—was an extremely venturesome task. To evolve a really scientific terminology which shall stand any chance of universal adoption from a number of words, which

« السابقةمتابعة »