THETRANSFEROFENERGY 67
hiddenas ever. Inregard tothe law ofgravitation
weknowa greatdeal;butinregardtotheforceof
gravitation—whateverwemaythinkorbelieveabout
it—weknowabsolutelynothing,andthesameistrue
ofeveryotherforce."
—
JosiahParsonsCooke,Erving
professor of chemistry and mineralogy in Harvard
University.
Newton,overandover again,insistedthathehad
nothing to do with gravitation as a physical cause.
Hesaid: "Howthese attractionsofgravity,magnet-
ism,and electricitymaybeperformed, Idonothere
consider. WhatIcallattractionmaybeperformedby
impulseorbysome othermeansunknown tome. I
usethewordheretosignifyonlyinageneralwayany
forcebywhichbodiestendtowardoneanother,what-
everbethecause."
—
"Optics/'queryji.
"Newton assuredlylent no shadow of supportto
the modern pseudo scientific philosophy which con-
founds lawsandcauses."
—
Huxley.
"Allweknowabouttheforceofgravitation,orany
otherso-calledforce,isthatitisanameforthehypo-
theticalcauseofanobservedorderoffacts."
—
Huxley.
Huxleycallsthisforceahypotheticalcause. "Hypo-
thetical"hasreferencetoahypothesis;itissomething
"assumedwithoutaproof,forthepurposeofreason-
ingand deducingproof." But a hypotheticalcause
is,intheabsolute sense,nocauseatall. Forces are
notcauses; forthey themselvesinturn mustbeac-
counted for. Noticehow itworks: Bodies tend to
move towardeach other; whatis the cause? "The
forceofgravitation,"saysthescientist. Butwhatis