Any one who will dip into them will find a quantity of original evidence which it would be hard to discover elsewhere, and this series is specially suggestive on many matters. The main results of the investigation may be stated very shortly as follows. In the first place, trades-unions, though subject to various legislative disadvantages, have spread hitherto, and are still continuing to spread, in a most remarkable degree. To mention no other example, the Society of Engineers, which has branches all over England, in our colonies, and in the United States, has increased in ten years from 15,000 to 83,000 members. In the same time its expenditure has amounted to nearly half a million of pounds sterling; and it is so powerful as to be able to fight almost any combination that can be brought against it.