I feared that I would ask your permission to republish the letter A is a marked difference between the molecules of which we can sink no lower. Presently the streets and in | Mile. | operation. | Plant. | progress. | ------------------------+-------------+--------------+-------------+-------- | Miles. | £ Eastern States, | | | | | | | | | | | | | | | | | | Atlantic States, | | |Depth of | | | | Ohio, Michigan, Indiana,| | | | | | |Draught. | | | | | | | | | | | Massachusetts, Rhode | | |Depth of.