adopted is Lewis' patent, which consists of several varieties of wheels.
Any operator can make a suitable wheel on the same plan of a turning lathe.

To Clean Buckskins.--When the operator is compelled to purchase an
unprepared buckskin, the following is a good process for cleaning it:
There is always in the buckskin leather that is purchased,
more or less of an oily matter, which is acquired in its preparation,
sometimes even amounting, to a third of its weight.
The following is the mode of ridding it of this noxious ingredient:
Dissolve, in about six or seven quarts of filtered water,
about five ounces of potash; when dissolved, wash with the solution
an ordinary buckskin; when it has been well stirred in the liquid,
the water becomes very soapy, owing to the combination of the potash
with the oily matters contained in the skin. Throw away this
solution and use some fresh water without potash and rather tepid;
change it several times until it remains quite limpid.
Then gently stretch the skin to dry in an airy shaded place.
When thoroughly dried, rub it well between the hands.
It thus becomes very pliant and velvet-like.

Reflectors for Taking Views.--There have been excellent cameras
introduced for taking views, but the time of exposure,
which is increased in proportion to the focal length,
is considered an objection; consequently many adhere to the old
plan of using the speculum, or rather, substitute a mirror.
I now have one which I have used for several years and find
it equal to any article of the kind have ever tried.
One is easily made by a tin man, at a trifling expense.
Procure a piece of best plate looking-glass, two and a half by five
inches for a quarter, or four by eight for a half-sized camera;