Portable Automatic Cone Kiln
The kiln consists of an electrically heated metal box enclosing a tumbling cage for the cones. A time clock on a motor automatically causes the cage to revolve for a desired interval, such as 10 minutes during each hour (fig. 2). Infrared bulbs generate heat controlled by a thermostat.
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Author(s): Karl B. Landquist
Publication: Tree Planters' Notes - Issue 35 (1959)