Note 23 — Chapter IX · IMPLEMENTS FOR OUTDOOR SPORTS AND ATHLETICS
Reading edition
You can get this height by taking two sticks whose combined length is somewhat greater than the height of the room. By letting the ends lap over one another in the middle, the sticks can be slipped along on each other until they just reach from floor to ceiling. Hold them tightly together (or fasten them with a clamp) when in this position and you will have the exact length required.