obtained a few straight sticks--four would have sufficed--and laid them
on the ground to form a frame or curb; then he prepared some mud, with
which he filled the frame, and which he piled up two inches above the
latter, leaving the depression for the fire-place. Before the structure
of mud was completed he laid in it the wooden nozzle of the bellows,
where it was to remain, with one end about six inches from the
fire-place, and the other end projecting about the same distance beyond
the frame; then he stuck into the nozzle a round piece of wood, which
reached from the nozzle to the fire-place, and when the mud work was
finished the stick was withdrawn, leaving an uninflammable tweer. When
the structure of mud was completed a flat rock about four inches thick
was laid on at the head of the forge--the end next to the bellows--to
form a back to the fire, and lastly the bellows was tied on to the
nozzle, which, as mentioned above, was built into the forge, with a
portion projecting to receive the bellows. The task of constructing this
forge did not occupy more than an hour.

[Illustration: PL. XVI. OBJECTS IN SILVER.]

A bellows, of the kind most commonly used, consists of a tube or bag of
goatskin, about twelve inches in length and about ten inches in
diameter, tied at one end to its nozzle and nailed at the other to a
circular disk of wood, in which is the valve. This disk has two arms:
one above for a handle and the other below for a support. Two or more
rings or hoops of wood are placed in the skin-tube to keep it distended,
while the tube is constricted between the hoops with buckskin thongs,
and thus divided into a number of compartments, as shown in Pl. XVII.
The nozzle is made of four pieces of wood tied together and rounded on
the outside so as to form a cylinder about ten inches long and three
inches in diameter, with a quadrangular hole in the center about one