The experiment of laying the Stevens rail in chairs was tried on the Albany and Schenectady road in 1837, on the Hudson River Railroad 1848, but the chairs were soon afterward discarded, nothing but spikes being used to attach the rail to the tie.
The dial gauge was not in use at that time.
Changes in the locomotive "John Bull" since date of construction, 1830:
Steam dome changed from rear of boiler forward to a part over what was called the "man-hole," and throttle valve placed therein.
Steam pipes changed to outside of boiler, connecting new dome with smoke box, entering it on each side.