Assertion: seesaw's member | /r/HasProperty | the `seesaw
Facets:
Source sentences:
text: Means are provided on the exercising device so vthat whenever the ver-tical memberis'oscillated by the rider that the horizontal member Vof the `seesaw will be oscillated in unison therewith and these means may take a number of formsone which is shown in the drawings.
text: 3 is a vertical sectional view along lines the horizontal and vertical members ofthe seesaw; and