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POPULAR SCIENCE MONTHLY 



limestone rock which everywhere abounds. This is cut into blocks a 

 foot or more in length, eight or ten inches wide and of different thick- 



Fig. 4. Great Sound, looking South from Spanish Point.* 



nesses. Even the roof is made of thin overlapping slabs of the same 

 rock supported by slats that rest on wooden rafters. The houses, roof 



Fig. 5. Harrington Sound. Photograph by A. H. Verrill. 



and wall, are whitewashed at frequent intervals, usually twice a year. 

 The rain that falls on the roofs is carefully collected in covered cis- 

 terns, for it is the only source of fresh water in the islands, since 



* I am greatly indebted to Professor A. E. Verrill for the use of about half 

 of the figures, those which he has furnished having been taken from The Trans- 

 actions of the Connecticut Academy of Science and from his ' The Bermuda 

 Islands,' New Haven, 1902, and •' Zoology of the Bermudas,' New Haven, 1903. 



