p. 2

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evident that the iron frame will move backwards and forwards and
produce the same movement on the valve. h is the fly wheel
g is the crank & is the shaccle bar.

Steam is generated in a Boiler and conveyed to the
steam chest at a in fig 2 and the same pressure that is produced
in the Boiler is on all parts of the steam chest. Now it is
evident that as the valve now stands in fig. 1 the steam
will pass through the opening m and down the side pipe of figure a
and into the cylinder at e figure 1. which would drive the pistern
head to the other end of the cylinder. this produces half of a
revolution of the fly wheel which pushes the valve to
the other side of the chest. the pressure being the same in the
steam chest the steam will pass through the opening e and
into the cylinder which produces the backward stroke of
the pistern. The cylinder being filled with steam at each
stroke it is evident that I must find its way out as often;
for this purpose the valve is made hollow underneath the steam,
(supporting the pistern going from right to left.) will pass up the tube
g fig. 2 and through the opening e now it is under the valve and
now what becomes of it? why it goes down through the opening
in which leads to the escape pipe. This is a description of the most simple form of
high pressure steam engine. There are many modes of construction but the
principle now are the high & low. Should you like my description
of this high pressure engine I shall feel it a duty to give a description
of the low high pressure with Perkens theory of bursting boiler ?
I shall keep a copy of the letter and if there is any part of it that
is not sufficiently explained upon notice there of I will endeavor
to correct them.

You want some buckeyes as you seem to have some
doubts as to the specific name I will give some explanation taken
from Dr. Drakes Cincinnati Thw Common Buckeye is not Eglobra but
E. pavia of Sine E. Pavia Sutea of Michaux and E flava. There ar
two species here. the other is called E maxima by Dr. Drake from

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to being the largest of the genius and having no name. It differs from
E. pavia by the following characteristics: flowers larger, corolla commonly
red, rarely orange_ the lateral petals last subtend, concave and enclosing
the corolla: Stamina shorter than the petals and concealed: Capsules smooth:
leaves larger than E. pavia declining lanceolate wedged toward towards the base,
unequally serrate, and generously villous underneath. It frequently rises to the height of 100 feet and the diameter of 4. I have not yet seen this species to
know it but will now hunt for it in my walks and procure seeds
of both species if required.

We are all well but have not received a letter from you
for some time which makes us somewhat uneasy if you have
got the fever and ague and write crooked letters you had better
get Barret to assist you in this duty.
(signed) Your affectionate brother
Increase Lapham

To D. Lapham Esq.
Welland Canal
U.C.