af between rim and tire,
breaking the cement and partially freeing tire; insert spring-leaf
farther at a point just about opposite valve and pry tire free
from rim, holding and working it free by pushing in other irons or
screw-drivers, or whatever you have handy; when lugs and tire are
out of the hollow of the rim for a distance of eighteen or twenty
inches, it will be easy to pass the iron underneath the tire,
prying up the tire until it slips over the rim, when with the
hands it can be pulled off entirely; the wheel is then raised and
the valve-stem carefully drawn out.

All this can be done with the wheel jacked up, but if resting on
the tire as suggested, the valve-stem is protected during the
efforts to loosen tire.

To put on a single-tube tire properly, the rim should be
thoroughly cleaned with gasoline, and the new tire put on with
shellac or cement, or with simply the lugs to hold.

Shellac can be obtained at any drug store, is quickly brushed over
both the tire and the rim, and the tire put in place--that holds
very well. Cement well applied is stronger. If the rim is well
covered with old cement, gasoline applied to the surface of the
old cement will soften it; or with a plumber's torch the rim may
be heated without injuring enamel and the cement melted, or take a
cake of cement, soften it in gasoline or melt it, or even light it
like a stick of sealing-wax and apply it to the rim. If hot cement
is used it will be necessary to heat the rim after the tire is on
to make a good job.

After the rim is prepared, insert valve-stem and the lugs near it;
let the wheel down so as to rest on that part of the tire, then
with the iron work the tire into the rim, beginning at each side
of valve. The tire goes into place easily until the top is reached
where the two irons are used to lift tire and lugs over the rim;
once in rim it is often necessary to pound the tire with the flat
of the iron to work the lugs into their places; by striking the
tire in the direction it should go the lugs one by one will slip
into their holes; put on the nuts and the work is done.

In selecting a half-leaf of a spring, choose one the width of the
springs to the machine, and carry along three or four small spring
clips, for it is quite likely a spring may be broken in the course
of a long run, and, if so, the half-leaf can be clipped over the
break, making the broken spring as serviceable and strong for the
time being as if sound.