In each generation there was sure to arrive some new mind to detect faults and show need of alterations; and the whole corps of inventors was at hand to apply their special faculty at the point criticized, and offer suggestions.

每一代都会出现新的头脑，发现缺点，指出需要改变之处；而整个发明者群体随时准备在受到批评的地方运用专长，提出建议。