Нил. — Water-conservation and Hawke's Bay Artesian Systems. 145 
Creek has not begun to flow, there is a considerable fresh in the Tukituki, 
and the water was coming down very thick. It was evidently raining in 
the mountains, and in the evening a little rain fell here. During the after- 
noon I looked at the well, and thought that the water in the head-tank 
was rising. This morning it is overflowing at the overflow-pipe, though 
the ground here is hardly damp and the Ongaonga not flowing. It seems 
evident that my well will rise and fall in sympathy with the Tukituki River, 
which rises in the ranges, and not with the Ongaonga Stream, which rises 
in the plains.” 
These observations by Mr. Watson as to the changes of flow in his well 
are of high value, and give a clue as to the source of supply of water for the 
artesian wells on the Ruataniwha Plain, into and around which the Tukituki 
has flowed during the filling-up of the plains. It is of great importance 
to understand the fact that all the artesian wells found in Hawke's Вау, 
and the Taupo Plateau is of comparatively recent date, and any facts that 
will help observers to determine a fair estimate of the time that has gone 
by since the changes occurred should be kept for future use. — 
The information furnished by those who answered the inquiry in à 
latter; and that high tides increase the height of flow, the difference 
between high and low water being as m 
Mr. John McDougall that a similar change of flow as between high and 
low water is noticeable in the artesian we 
i hat the 
Е eady been stated it must now be apparent t 
V cte а ды чай like the Heretaunga ог Ruataniwha Plain 
cannot be used for the supply of deep underground beds in the immediate 
se, as already pointed out, 
than old flowage beds or 
