About ten thousand copies of the SCIENTIFIC AMEKICAN are regularly sold to local agents in various parts of the country. We should be glad to have this number greatly increased. One of our friends, writing from Worcester, Mass, informs us that he has induced several of the workmen in his shop to take the paper regularly from the news-agent. Will not all of our friends who receive the paper in this manner, urge some of their friends to do likewise? Thus they will increase the weekly edition of our paper, and also help the business of the " news-dealer," who, next to the parson and the doctor, is the most useful and entertaining man in the village.