MUSSOORIE-DEHRA DUN EPTCENTRAL TRACT. 



85 



Apparent direction of principal motion is from N.W. to S.E. 



This is a massive brick building aligned N. 70° W. It is 75 feet 

 Roman Catholic l° n g, an( l 25 feet in width and has a pointed roof. 

 Cha P el - The longer walls are each supported by six buttresses 



measuring 3 feet by 2 feet. On the north and south faces more than 

 half of the buttresses are cracked horizontally at points from 2- — 3 feet 

 from the ground ; whilst two of them are separated by cracks from 

 the walls. In the same walls the cracks. hade to the east, at angles of 

 0°, 20°, 30°, and 45° from vertical. 



On the east face the porch has slightly separated from the main 

 building. Of the arches in the porch that facing east is cracked 

 vertically at the crown, whilst in those at right angles the cracks hade 

 east at about 30° from vertical. The main east wall shows a crack 

 hading N. at 45°, and also slight irregular fracturing. A well pro- 

 nounced horizontal crack runs along the wall at the level of the spring 

 of the roof. In the interior the four corners are slightly cracked. The 

 roof and ceiling are partly carried by a series of five tranverse arches. 

 Everyone of these arches is cracked, and as they are somewhat flat and 

 are said to have been built without key-stones, would have collapsed, but 

 that they are held to the main walls by ircn ties. The nature of the 

 damage to two of these arches is shown in fig. 25. 



K 



3 1 13 





/-i 





/ \/ \ 











J 



TIC ROO 



Fig. 25 

 Apparent direction of principal motion N. 20° E.— S. 20° W. 



