The Prussian Calculator: By Which All Business Calculations Are Performed by One Rule; With an Appendix (Classic Reprint)
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Excerpt from The Prussian Calculator: By Which All Business Calculations Are Performed by One Rule; With an Appendix
If, 381 have stated, there are but two principles embraced in numbers - that of increase and decrease - why multiply rules? Let these be taken in their simplicity and investigated, and they cannot fail of leading to correct results.
It may be true that rules are of use; so are leading strings to the child, or ﬂoats to those who cannot swim; yet we had bet ter rely on nature in either case. So it is with the science of numbers. When once we have learned the elementary princi ples, we are then prepared to be emancipated from technical rules, and should rely alone on general principles.
Indeed, we must pass by reliance on rules, before this sci ence can enlarge the understanding or invigorate the mind; and one object of this work is, to guide beyond that point, and cause us to rely on our own judgment of principle.
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The Prussian Calculator: By Which All Business Calculations Are Performed by ...
Isaac A. Clark
Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2017