To take 3 Copies take your first Copy in the usal way. Then, before the original is quite dry, lay another sheet of wet Paper on it and take a second Copy. Then take a third copy from the back of the first Copy. This last will be on the side of the Paper from which it is read. It is not therefore necessary to have thin Paper. When 3 Copies are to be taken it will be well to write the Originals only on one Side.