This page needs to be proofread.
Timing the Clouds to Determine the Weather
���The "Comb Nephoscope." It consists of an upright brass rod about nine feet long, bearing at Its upper end a cross-piece to which a number of equidistant vertical spikes are attached. The observer turns the cross-piece until the cloud appears to travel along the line of spikes, and notes the time it takes to pass from spike to spike. This forms a basis from which he reckons
��675
�� �
