Pi-oc. U. I. Acad., Vol. XXVII. Sact. B. 



3Ch. Chimneys 



m S Noteworthy sta 

 20 HciQHT OF Roof I, 

 — >■ Slope Downwards . 

 — ^ZO. Slope WITH Drop II 

 -t-^30° Slope OF FLOOR V. 

 '^B Boulders blocking f 

 -zs^ Standing Wat 



