The value of Dalton's generalizations can hardly be overestimated, notwithstanding the fact that in several cases they needed correction.
His output of work, in catalogues, &c., was enormous, and his services to the Bibliotheque Nationale in this respect cannot be overestimated.
The influence which Mill's works exercised upon contemporary English thought can scarcely be overestimated.
By strengthening the older methods, and devising new ones, he exerted an influence which can never be overestimated.
The importance of the general conclusions above formulated, as imposing a limit upon our powers of direct observation, can hardly be overestimated; but there has been in some quarters a tendency to ascribe to it a more precise character than it can bear, or even to mistake its meaning altogether.