:>40 MR CADELL ON EXPERIMENTAL RESEARCHES IN MOUNTAIN BUILDING. 



bring out the structure effectively, a diagrammatic section from the photograph itself and 

 from notes made at the time it was taken is exhibited alongside. 



2 

 '3 



In nearly every instance the pressure was exerted from the right, and the pressure 

 board is seen in the figures supporting that end of the section. The thin white streaks 



