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that is-I made you put 4 from the right hand into the left, and cast
away the remainder; now your right hand has 4 more; then I make you
throw away as many from the right as you threw away from the left;
so, throwing from each hand a quantity of which the remainder may be
equal, you now have 4 and 4, which make 8, and that the trick may
not be detec- ted I made you put 5 more, which made 13.
TRICKS OF DIVIDING.
Take any number less than 12 that you please; then take of mine
enough to make up the number 12, and that which remains to me is the
number which you at first had; because when I said, take any number
less than 12 as you please, I took 12 into my hand, and of that 12
you took such a number as made up your number of 12; and what you
added to your number, you took from mine; that is, if you had 8 to
go as far as to 12, you took of my 12, 4; hence this 4 transferred
from me to you reduced my 12 to a remainder of 8, and your 8 became
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2; so that my 8 is equal to your 8, before it was made 12.
[
Footnote 1334: G. Govi says in the 'Saggio' p. 22: Si dilett
Leonarda, di giuochi di prestigi e molti (?) ne descrisse, che si
leggono poi riportati dal Paciolo nel suo libro: de Viribus
Quantitatis, e che, se non tutti, sono certo in gran parte
invenzioni del Vinci.]
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