A memorial has been presented to Congress, asking for a grant of 1,500,000 acres of land, to be located along the line of a tele-legraph, which the memorialists propose to build between St. Louis and San Francisco, by the way of Salt Lake City. The memorialists propose to give to the government in return for the grant, the right, for ever, to transmit, free ol charge, over the line, all official despatches and communications with a preference over all others. The importance of the measure, they say, "is too great to be measured by the value of a few acres of worthless land." The scheme is a magnificent one ; and so is the gift which they ask of Government.