a. [f. STACK sb. + -LESS.] Without a ‘stack’ or chimney.

1

1857.  Biblical Recorder, 14 May, 4/4. A story is told of a tribe of Indians who fled from a relentless foe in the stackless forest in the Southwest.

2

1883.  G. P. Lathrop, in Harper’s Mag., Aug., 332/2. Eighteen locomotives [are] kept,… and several stackless ones for running into the adjacent mines.

3