Please see the Transcriber’s Notes at the end of this text.
INVENTORS AT WORK
Copyright by Park & Co., Brantford, Ontario.
PROFESSOR ALEXANDER GRAHAM BELL.
Inventors at Work
With Chapters on Discovery
By George Iles
Author of “Flame, Electricity and the Camera”
Copiously Illustrated
New York
Doubleday, Page & Company
1907
Copyright, 1906, by
George Iles
Published October, 1906
All rights reserved, including thatof translation into foreign languages,including the Scandinavian
TO MY FRIEND
JOSEPHUS NELSON LARNED
OF BUFFALO, NEW YORK
CONTENTS
| PAGE | ||
| LIST OF ILLUSTRATIONS | xiii | |
| ACKNOWLEDGMENTS | xxi | |
| CHAPTER | ||
| I. | INTRODUCTORY | 1 |
| II. | FORM Form as important as substance. Why a joist is stiffer than a plank. The girder isdeveloped from a joist. Railroad rails are girders of great efficiency as designed and tested by Mr. P. H. Dudley | 5 |
| III. | FORM CONTINUED. BRIDGES Roofs and small bridges may be built much alike. The queen-posttruss, adapted for bridges in the sixteenth century, neglected for two hundred years and more. A truss replaces the Victoria TubularBridge. Cantilever spans at Niagara and Quebec. Suspension bridges at New York. The bowstring design is an arch disguised. Why bridges arebuilt with a slight upward curve. How bridges are fastened together in America and in England | 18 |
| IV. | FORM CONTINUED. LIGHTNESS, EASE IN MOTION ... BU KİTABI OKUMAK İÇİN ÜYE OLUN VEYA GİRİŞ YAPIN!Sitemize Üyelik ÜCRETSİZDİR! | |