If a new process is adopted which proves no better,or not so good as those before in use,the labour expended in perfecting the invention and in carrying it into practice,though employed for a productive purpose,is wasted.

• 如果所采用的一种新生产方法并不比以前的方法好，甚至还不如以前的方法好，那么花费在完成和应用这个发明上的劳动，虽说是用于生产目的，却也被浪费了。