He hit the floor on all fours and snapped at the hen as she rolled by.
The furnaces are square and open in front, to allow the outlet ends of the retorts to project; they are grouped together by fours; and their several chimneys are within the same enclosure.
The bear dropped down on all fours and growled at her offspring, who dashed back into the trees.
Opening out of this and the other chambers, and connecting them together, are a series of low winding passages or cuniculi, just large enough for a man to creep through on all fours.
Conidia (basidiospores) borne in fours on a special conidiophore, the basidium.
