"Near the end of his life, Newton described himself to his nephew and biographer, John Conduitt, in these pleasant words: 'I do not know what I may appear to the world, but to myself I seem to have been only a boy, playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.'
"Two hundred years later, biographer Milo Keynes wrote: 'This life of apparent serenity was, however, far from the truth, for Newton is known to have had a most complex and difficult personality.' His colleagues described him variously as fearful, cautious, suspicious, insidious, ambitious, excessively covetous of praise and impatient of contradiction. Even his closest relatives and true friends were modest in their praise." -- "Sir Isaac Newton: Warden and Master of the Mint," by Michael E. Marotta, The Numismatist, November 2001. (George Heath Literary Award, 2nd Place, 2002.)
10 REM MIKE MAROTTA. FEB 5, 1987. NEWTON'S ALGORITHM FOR SQUARE ROOTS
19 LIMIT= .0001
20 PRINT "ENTER A NUMBER"
21 INPUT X
56 XN = X/2
60 R1 = (XN + X/XN)/2
70 IF ABS(XN-R1) < LIMIT THEN GOTO 80
75 XN = R1
76 GOTO 60
80 PRINT "THE SQUARE ROOT OF ";X;" = ";R1
PREVIOUSLY ON NECESSARY FACTS
Newton versus the Counterfeiter
Fig Newtons and Leibniz Biscuits
The Structure of Scientific Revolutions