is added,
the kiln car is forced out against a strong tension. When the car is
loaded, binders are put on over the stakes by means of a powerful
lever arrangement.

[Illustration: Fig. 42. The above illustration shows the
construction of the Automatic Lumber Stacker for edge piling
of lumber to go into the dry kiln end-wise.]

[Illustration: Fig. 43. The above illustration shows the
construction of the Automatic Lumber Stacker for edge piling
of lumber to go into the dry kiln cross-wise.]

[Illustration: Fig. 44. The above illustration shows a
battery of Three Automatic Lumber Stackers.]

[Illustration: Fig. 45. The above illustration shows another
battery of Three Automatic Lumber Stackers.]

[Illustration: Fig. 46. Cars Loaded with Lumber on its Edges
by the Automatic Lumber Stackers.]

After leaving the dry kilns, the loaded car is transferred to the
unstacker (see Fig. 47). Here it is placed on the unstacker car which,
by means of a tension device, holds the load of lumber tight against
the vertical frame of the unstacker. The frame of the unstacker is
triangular and has a series of chains. Each chain has two special
links with projecting lugs. The chains all travel in unison. The lug
links engage a layer of boards, sliding the entire layer vertically,
and the boards, one at a time, fall over the top of the unstacker
frame onto the inclined table, and from there onto conveyor chains
from which they may be delivered to any point desired, depending upon
the length and direction of the chain conveyor.

With these unstackers one man can easily unload a kiln car in twenty
minutes or less.

[Illustration: Fig. 47. The Lumber Unstacker Car, used for
unloading cars of Lumber loaded by the Automatic Stacker.]

[Illustration: Fig. 48. The Lumber Unstacker Car and
Unstacker, used for unloading Lumber loaded by the Automatic
Stacker.]

The experience of many users prove that these edge stacking machines
are not alike. This is important, because there is one feature of edge
stacking that must not be overlooked. Unless each layer of boards is
forced into place by power and held under a strong pressure, much
slack will accumulate in an entire load, and the subsequent handling
of the kiln cars, and the effect of the kiln-drying will loosen up the
load until there is a tendency for the layers to telescope. And unless
the boards are held in place rigidl