Twentieth century inventions, a forecastLongmans, Green, and Company, 1901 - 286 páginas |
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Página vii
... extent , stand apart from the personal qualifications of any individual inventor . In the course of a search through the vast accumulations of the patent specifications of various countries , the thought is almost irre- sistibly forced ...
... extent , stand apart from the personal qualifications of any individual inventor . In the course of a search through the vast accumulations of the patent specifications of various countries , the thought is almost irre- sistibly forced ...
Página 13
... extent removed from certainty . He may spend much time in laborious searching ; make many in- quiries from persons whom he believes to be competent to advise him ; diligently study the conditions upon which the problem before him ...
... extent removed from certainty . He may spend much time in laborious searching ; make many in- quiries from persons whom he believes to be competent to advise him ; diligently study the conditions upon which the problem before him ...
Página 20
... extent avoidable . Pleasurable exercise will be substituted for the monotonous , manual labour which , while it continues , generally precludes the possibility of mental improvement . Hy- gienic science will insist more strenuously than ...
... extent avoidable . Pleasurable exercise will be substituted for the monotonous , manual labour which , while it continues , generally precludes the possibility of mental improvement . Hy- gienic science will insist more strenuously than ...
Página 27
... extent destroyed . For its revival there is no doubt that , as Lord Kelvin remarked in the address already quoted , " the little thing wanted to let the thing be done is cheap windmills " . This , however , leads to another part of the ...
... extent destroyed . For its revival there is no doubt that , as Lord Kelvin remarked in the address already quoted , " the little thing wanted to let the thing be done is cheap windmills " . This , however , leads to another part of the ...
Página 35
... extent . Practically this cheap and efficient wind - motor then becomes a square or hexagonal upright axis of fairly large section , to each side of which is secured a board or a rigid sheet - metal sail projecting beyond the corners ...
... extent . Practically this cheap and efficient wind - motor then becomes a square or hexagonal upright axis of fairly large section , to each side of which is secured a board or a rigid sheet - metal sail projecting beyond the corners ...
Otras ediciones - Ver todas
Términos y frases comunes
adopted already alternate current apparatus appliances application B.Sc BOTANY buoy cable calcium carbide carrying cheap CHEMISTRY collectivism College Coloured compressed air constructed convenient course Crown 8vo D.Sc Diagrams direction driving dynamo economical effect electric current electric lighting ELEMENTARY energy engine fact force future heat Hospital Illustrations improvement industrial INORGANIC CHEMISTRY invention inventor JOHN TYNDALL kind latter Lecturer LL.D lodes Lond machine machinery MAGNETISM Manual means mechanical ment metal methods miner mining motion motor natural naval nineteenth century numerous operation PHYSIOLOGY piano pipe Plates practically principle Professor progress pumping purposes R. A. PROCTOR rail railway render road Royal 8vo running sail Science screw shaft ship side speed station steam steam-engine steel storage battery STRENGTH OF MATERIALS suitable tank telegraphy TEXT-BOOK tion traction traction engines truck turbine twentieth century utilised ventilation vessel wave-power waves wheel wind windmill wire Woodcuts
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