177 
From the well-ascertained pitch of the quartz bodies it is clear that 
future operations in this mine, if they are to be successful, must be carried 
on at a greater depth, and, it would seem, in a northerly direction. My 
inspection of the mine leads me to the conclusion that the workings have 
entered unfavorable country, and that it will be necessary to follow the 
fracture planes connected with the dyke until they re-enter favorable 
country. 
There are no other reef workings within 4 miles of the Mia Mia mine, 
and, so far as I could learn, no prospecting has been done. Physically 
the country surrounding the mine may be considered as an irregular basaltic 
plateau, through which the Campaspe River and its tributaries have cut 
deep valleys, exposing the underlying sedimentary rocks. These rocks 
are seen to be folded into anticlines and synclines, and there are definite 
indications of veins of ore at the surface. In every direction there is much 
unexplored country over which the indications are favorable, at least for 
prospecting. 
The accompanying sketches show sections of the mine workings and the 
structure of the country in which the quartz bodies occur. (Plate XXV.) 
[Report sent in 23.11.07 .] 
MINERAL SPRINGS AT DAYLESFORD. 
By E. J. Dunn , F.G.S., Director , Geological Survey. 
The springs dealt with are the Jubilee Lake Spring, Hard Hills 
Spring, Sutton’s Spring, and Leggatt’s Spring. The former is about 
3 miles east of the town; the others are near the town, along the course 
of Wombat Creek as it flows southward from Daylesford. 
Although they occur in a volcanic region, it is not certain that they 
owe their origin to volcanic sources, for it is clear that the mineral springs 
at Geelong, Bailan, near Blackwood, Daylesford, and to the south-west 
from Maldon are nearly on one line, and they may owe their origin to 
a fault line. Owing to their valuable curative properties and to their 
agreeable qualities as table waters, they are of great value to the town 
in attracting tourists, invalids, and others. Anything, therefore, which 
tends to restrict their flow, or otherwise to injure them, should be pre¬ 
vented if possible. It is generally accepted that these springs do not 
flow as freely as formerly and that the country around Daylesford has 
become much drier than in the first years of settlement. The disappearance 
of swampy ground and of small springs, and the diminution in the volume 
of the creeks is strongly marked, and in this respect the mineral springs 
exhibit a lesser volume of outflow than formerly in common with the 
lessened volume of water in ordinary springs and in the creeks. 
When settlement began at Daylesford, the country was covered bv a 
dense forest growth, many of the timber trees attaining to a great height. 
This has been removed to allow of the cultivation of the ground, for 
grazing purposes, for mine timber, for building purposes, and for fuel, 
and the forest has been drawn upon until the original growth has been 
entirely removed, and where there is any forest remaining it consists of 
an aftergrowth of saplings. The cutting of races and driving of tunnels 
have also helped to diminish the water supply. 
The value of trees as a means of condensing moisture from the air is 
in proportion to the space they occupy in the atmosphere, and the present 
growth occupies but a fraction of what was occupied by the primeval 
forest. The inevitable result of removing the trees is that the country 
