Side rods were never used.

Driver spring was changed from a bearing under the pedestal boxes
to a point over the boxes.

The pilot was attached in this manner:

Right forward wheel being loose, forward axle extended eight
inches beyond box on each side; to this was attached the beam of
the pilot, having play of about one inch between box and pedestal
plate to act while going around curves. The weight of forward part
of engine rested upon a cross brace of the two-wheel pilot, which
took bearing by a screw pin surrounded by a spring, by turning
which pin the weight on the drivers could be adjusted.

A brace used as a hand rail was added on top of the frame, bracing
frame and acting as a guide to the driving springs.

Water-cocks changed from right to left side of the boiler.

Bell, whistle and headlight were added.

Balance safety valve scale was changed forward to a point over
barrel of boiler, the secret valve being over the new dome.]

IMPROVEMENTS IN LOCOMOTIVE BUILDING.

During 1831-35 the company's shops were located at Hoboken, N.J., and
during the winter of 1832-33, three locomotives were commenced at
these shops (two completed before March, 1833, the other in April),
the valves, cylinders, pistons, etc., coming from England, the boilers
being made under the direction of Robert L. Stevens. It was his
opinion that the "John Bull" was too heavy, and the new boilers were
built smaller and lighter, so that the engines, when completed,
weighed eight instead of ten tons. With these three engines, which
were delivered to the railroad company at South Amboy, the stone
blocks and other material for the permanent track was delivered along
the line of the road.

BALDWIN'S FIRST LOCOMOTIVES.

The importation of the locomotive "John Bull" was destined to have a
far-reaching influence in moulding the types of early American
locomotives.

After the demonstration of November 12, 1831, the engine was taken
from the track and stored in a shed constructed to protect it until
such time as the track should be completed.

It was about this time that the proprietor of Peale's Museum, in
Philadelphia, applied to Matthias Baldwin, an ingenious mathematical
instrument maker, for a small locomotive to run upon a circular track
on the floor of the museum. Mr. Baldwin had heard of this locomotive.
He came to Bordentown and applied to Isaac Dripps for permission to
inspect it. Mr. Dripps