Mr. Hudson, of Patterson, the author of the late article on White's Truck, on page 163i writes unto us stating that there were several errors printed by us not in his letter, which he wishes us to correct. We will correct them, but beg to state that his letter was carefully read with the proof, and the blame is not ours. The article says " his truck ought to be compared with such as are calculated (or even (read uneven) roads." Again, where it says " the centre bearing trucks put upon the Auburn and Rochester Railroad, by Eastwick and Harrison had eccentric centre pins," is not correct ; it should merely have stated " that trucks having such centre pins were in use several years ago on the said road."