片断:
PROLOGUE
AUnifiedViewof
PhysicalProcesses
Heraclides(550-480)
Everythingflows.WaterandairflowonthesurfaceoftheEarth,wheretheycre-
atethemultitudeofphenomenaweknowfromeverydaylife.Windscanimpart
theirmotiontothewateroftheoceans,andinafar-awayplace,thismotioncan
bepickedupagainthroughtheactionofthewaves.Theseprocessesaremain-
tainedbytheradiationpouringoutfromthesurfaceofthesun;lightflowsfrom
therethroughspace,andsomeofitisinterceptedandabsorbedbyourplanet.
Bothinnatureandinmachines,heatisprod