Much can often be learned by the repetition under different conditions, even if the desired result is not obtained. Archer John Porter Martin More Quotes by Archer John Porter Martin More Quotes From Archer John Porter Martin Since, however, it is immaterial whether the work is done by assistants or a machine, I decided to build a machine equivalent to an array of about 200 separating funnels. Archer John Porter Martin build about done work If every conceivable precaution is taken at first, one is often too discouraged to proceed at all. Archer John Porter Martin every first discouraged taken
