152 BULLETIN OF THE NATURAL HISTORY SOCIETY. 



Better success, however, attended the boring of a well at Connor's 

 ropewalk, on the Adelaide road, which lies in a limestone valley be- 

 tween two granite ridges about a mile to the northwest of the Convent 

 well. Here an ample supply of water was obtained. 



Where we have ascertained the level at which the water stands in 

 wells driven near the harbor or river, it would seem that the level is 

 affected by that of the river ; thus in both the Asylum well and that 

 of Mr. Ready the water surface in the well is about the level of low 

 water. At the Alms House, on the contrary, where the now is un- 

 usually heavy, it rises considerably above high tide level. 



The following may be suggested as working hypotheses to govern 

 the search for water by deep boring in compacted sedimentary and in 

 igneous rocks, to be proved or disproved by further exploration. 



1. Water veins are most likely to exist in bands of such rocks 

 that abound in joints or faults, rather than in bands where such joints 

 are scarce ; hence more likely to be found in valleys than on ridges. 



2. In a complex of soft slates and sandstones the water veins 

 may be looked for in the sandstones, not ia the slates. 



3. The water will stand in the wells approximately at the drain 

 age level of the district, and not be lifted by artesian pressure as in 

 wells of the first class. 



In conclusion we may here call attention to the advantage of tin- 

 comparatively inexpensive boring of wells in the surface deposits, to 

 the porous stratum below the brick clays, from which in many flat 

 and low-laying tracts in the province, pure and copious supplies of 

 water may be obtained. 



