...twenty-six propositions of the first book. The next and second step, though not without considerable fault, yet avoided the error of supposing that the learner...new kind of quantity, and admitted as a subject of operation, though not one of distinct conception* Thus, 1-2, and a - (a + #), appeared under the name...

...kind, into which no particular inquiry was made, because the symbols would give true results, [which] did not differ from those previously applied to the...the latter case it was conceived to be a certain new sort of quantity, and admitted as a subject of operation, though not one of distinct conception. Thus,...