Lectures on the Logic of Arithmetic #247397

In the first place, though he knows a good deal about antithesis of Operations (e. G. He knows that subtraction is the opposite of addi tion, division of multiplication, movement in the direction minus m of movement in the direction as, and so on), he has not the habit of observing in What respects antithetic Operations neutralize each other, and in what respects they are cumulative; and surely no habit is more needed than this as preparation for making calculations in electricity or mechanics.