10 
employed at this spot (which engine is one of high-pressure and six-horse power), I beg to submit the 
following calculations : — 
Yield — In one hour ... ... ... ... ••• 4,962 gallons 
In one day, under actual working, of ten hours 
49,620 
3 ) 
In one year, with 308 working days of ten hours’ work ... 15, 
,282,960 
>3 
£ 
S, 
d. 
Expenditure — Wages of an engine-driver for eight hours each day, at 
0 
8 
0 
Wages of a mechanic for two hours each day, at ... 
0 
2 
0 
Four and a half cwt. of coals each day... 
0 
5 
11 
Oil, nearly 1 lb. 
0 
0 
7 
Tallow, cotton-waste, and anti-friction grease 
0 
0 
10 
Daily expenses ... 
... £>0 
17 
4 
Expenditure per year of 308 working days, 17s. 4d. per day 
... £>266 
18 
8 
The expenditure for the raised Yarra water exceeds thus, slightly, 4d. per 1,000 gallons. 
New South Wales house coal, screened, per ton of 2,240 lbs., as under contract for 1869, <£*1 63. 
I cannot state the precise value of the engine, it being transferred from another department. 
The above calculation allows, however, not for occasional repairs, nor for a few hours’ detention 
of the work during each week for cleaning purposes, nor for interest on capital expended for the engine, 
force-pump, and water-pipes. 
The capacity of the small temporary tank to receive the water at the summit of the ridge is, 
however, only 1,700 gallons, and until provision shall have been made for a spacious and raised tank, as 
intended, one great difficulty will continue, namely, that although a large supply of water is available it 
can, under faint pressure, only in very limited quantity find its way through the ramifications of the 
former Yan Yean pipes to distant higher parts of the Garden and reserves. 
The eight mostly spacious cisterns for the reception of rain-water from the roofs of the Garden 
buildings, and the four iron tanks, will be kept filled, to provide against any emergency in the event of 
breakage at the engine. I may still remark that, although during the cooler months steam-power will 
not require to be used every day, nevertheless, any savings then effected in the outlay will need to be 
expended again during the hottest w'eather, when fourteen hours’ daily work cf the engine will be 
needed. 
The Geyser fountain in the lake (which for two afternoon hours in cool weather, and then on 
Sundays only, was worked with Yan Yean pressure) has ceased to play. Until the steam-engine was 
provided the Garden enjoyed Yan Yean supply during two night hours (from 3-5 a.m.), provided in 
cool weather the pressure admitted of obtaining any supply at all; but this boon has now entirely ceased. 
The whole of the former Yan Yean pipes, provided on expenses of the Garden, have become available 
again for the conveyance of the Yarra water. 
The large reserve between the St. Kilda road and the Yarra is converted, within the last five 
years, from a treeless waste into an incipient forest. From year to year additional kinds of trees 
become interspersed ; thus shade and shelter as well against the north-western desert winds, as also 
against the south-west antarctic storms, will be more and more obtained. Few even of our metropolitans 
seem aware that the verdant valleys which, within five minutes’ drive from the City bridge, slope gently 
to the Yarra, afford already charming picnic grounds, on which, free from the dangerous vicinity of the 
reptiles of our ranges, field amusements can be enjoyed simultaneously with views of rare beauty. 
Access of carriages to the whole of this rising ground and its gullies is permitted, under the anticipation 
that all ordinary caution will be exercised to prevent injury to the young trees. By the gradually 
denser growth of grass, lucerne, and clover plants, the so-called Cape-weed (Cryptostemma calendula- 
ceum) has become largely suppressed; but inasmuch as the Director of the grounds has repeatedly 
been accused of having brought this and other weeds, as well as some winged invaders, into our colony, 
it may be right to place it here on record, that the whole of these assertions is contrary to facts, and 
that already, in 1833, Baron Von Huegel noticed and recorded the Cryptostemma as an inexterminable 
weed of Australia. A gardener’s cottage occupies, since a few months, the last of the empty old quarries, 
until then a favorite retreat of vagrants. 
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