Assertion: seesaw | /r/HasProperty | vertical member
Facets:
Source sentences:
text: Another object of this invention is to provide a novel exercising device including a seesaw wherein there is a vertical member pivoted at approximately the-fulcrum of the seesaw which vertical member is adapted to be oscillated by the rider on the seesaw and in which exercising device there are means operatively connecting the vertical member and the horizontal member of the seesaw so that the vertical member and horizontal member oscillate in unison.