136 Transactions. 
solids held in solution. In the Napier wells, and estimated on the flow 
already stated, there are 440 gallons daily of solids brought to the surface, 
or 951 cubic yards in a year. So also on the same proportionate estimate 
of solid contents in the supposed 1,100 wells over the plain area, 17,130 
cubic yards of solids are brought to the surface in solution in the course 
of the year. 
The general purity of the water as determined for Napier is in ever 
respect satisfactory. would be well, however, to have its actual hardness 
determined. The receiving tanks or basins into which the water flows 
om the different wells tell their own story as to the sand, shingle, and 
other material that is brought to the surface, and unless there is replace- 
ment of the material that is withdrawn with the water in suspension and 
solution the overlying pressures will in time bring about altered conditions 
in the water-bearing beds. Creeps are certain to occur. They may at 
the present time be hardly appreciable, but experience can be quoted of 
important changes taking place in various wells both in Napier and the 
plain area, and I do not doubt, if only proper records were kept, some 
surprising results would be available. 
The facts that have been obtained as to the varying depths of the 
artesian wells in different localities enable a section to be drawn showing 
