Page:Popular Science Monthly Volume 77.djvu/139

Rh was given on level ground, or an incline, and whether facing the observer or away from him, though with variable movements in many

 removed from underground and placed in line, to illustrate habit of keeping still, and of walking backwards.

 one minute after the position assumed in Fig. 31 was photographed, showing that Nos. 1 and 5 have each taken a few backward steps, while the pose of Nos. 2 to 4 has not appreciably changed.

cases. When placed in head-to-tail line, and in contact, the line would remain unbroken for a surprising length of time, with hardly the turn of a head, which seems to be due to their habit of sitting still, with