SYDNEY MAGAZINE OF SCIENCE AND ART. 
43 
stnted, had boon laid down when tho site on 
which the embryo city now stands, was originally 
fixed upon, for the groat future seaport ns 
well as capital of tho colony, and let us suppose 
that this plan had been unremittingly acted upon 
ever since. What tfnuld now have been the 
results ? Commencing East, and thence proceeding 
West, if for the mere convenience of some one fixed i 
arrangement, lot us begin with Ttushcutter Bay or 
Cove ! What then long since would, or must, under 
such a system, havo become of thoso mud flats, which 
at present d»*fAce one-fourth, at least, of this pieco 
of water? Exposed to tho air tho greater part of 
the 24 hours, and emitting more or less pestilent 
vapours, together with that low swampy plot at its 
head, lying between 44 Darling Point” and “l)ar- 
linghurst ?” Tho reply is obvious. Not only would 
the whole of that* spot, at tho same time, 
With tho mud nuisauco of the Cove have long since 
utterly disappeared *, but the Cove itself would not 
have been reduced in depth, as it has been, and that 
even at its embouchure, from about four to about 
two fathoms, while any silt or mud that might pos¬ 
sibly have collected on its shores at the period of 
our first arrival, would itself, long since, have boon 
removed and measures adopted precluding the pos¬ 
sibility of any future rc-accumulations—while the 
mud and silt so obtained, might have been laid around 
the head of the Cove, and covered with fitting mate¬ 
rials, so as to form a broad embankment of only 
just sufficient elevation to be secure against the 
invasion of the highest tides, and that in tho 
roughest weather. 
This broad water-line embankment, in order to 
enable it to withstand the occasional washings of 
the waves or tides would have been protected 
with a low massive stone facemcnt, attached to 
which, here and there, would bo a few broad 
low, steps, descending into tho water, when the 
tide was in, and giving at all times an easy access 
to what would then have been the clear, brilliant 
waters of the cove, for tho convenience of children 
and fem»lo bathers, while the “ debris’* resulting 
from the mere indispensable levelling of “ Darling 
Point” and “ Darlinghurst/ 1 together with tho 
contiguous, sand-hills would have afforded ample 
material, for the due filling up of the entire space, 
now little better thin a more bog, between those two 
localities— while tho border facing the water would 
have been converted with an elevated plateau or 
terrace, possibly some SO or 40 feet, or more, if re¬ 
quisite, in height. A strip of this plateau, some 
200 feet in breadth, and extending its entire length, 
would havo been loft to the public, as a “ constitu¬ 
tion’’ promenade, faced on its water-front with solid 
masonry— while it would communicate with, the 
Water-line platform below by flights of steps (one 
at each end,) descending sideways, so as to encroach 
&s little as possiole on the latter. The steps them- 
feclves Would bo low, broad, of araplo length, ami to 
render them as convenient and safe as possible, con¬ 
structed with, here and there a level space, similar 
*0 the landings’’ in a staircase, while their outer 
Hdge or border, together with that of tho entire 
?t promenade 1 ' would bo protected with-ballustrades, 
or a high iron railing. 
Tho inner or land edge border of tho promenade 
Would have been bounded, by the course of tho 
8outh Head Road ; but which in no placo would 
have been less than 100 feet in breadth, as consti¬ 
tuting one of the main east entrances to the city, 
while the road itself, by its greatly increased eleva¬ 
tion, would have ascended to the Point at the one 
end, and to Darlinghurst at the other, by the most 
easy gradients. 
As to the Bay or Cove—as this small Cove could 
scarcely ever be required for shipping purposes, for 
which 1 believe it is not particularly well suited, it 
processes above described, andSndly, in addition, by 
throwing across its embouchuro a pallisade, consist* 
ing of perpendicular iron rods or rails, protected, 
with a covering of Gutta Perche, as elsewhere 
described. 
The little stream of fresh water passing through 
the centre of the present swamp, now raised to a 
level with tho contiguous road, could have been 
readily provided for by the talented practical engi¬ 
neer, perhaps conducted to an artificial tank on the 
beach, for the supplying of the bathers with such 
fresh water as they might require, while tho surplus 
might bo allowed to flow over the ed^es of the basin 
or tank, pure and translucent into the cove. 
Proceeding West, as proposed, wo next come 
to Woolloomooloo. Ilere the minuteness, and I fear 
tediousness, of the last description, may fortunately 
save some time, inasmuch as tho Bteps to be taken 
here, would be much the same as thoso just de¬ 
scribed. Tho “ dredge”—tho waterline platform, 
with the reduction and levelling of the conterminous 
heights—while tho whole of tho great basin or valley 
itself, would have had to bo literally filled up nearly 
to tho brim. Bordered along its more extensive 
water-front, with the same species of artificial u 
race,’’ or “plateau.” and of about the same height 
—(some 30,40, or 50 feet,) as that at *‘ ltushcuttor. 
There would have been at each end the same species 
of massive stone steps, as a means of transit “ to 
and fro” the waterline platform beneath. Hero also 
a strip of the upper platform or terrace (not less 
than 200 feet in broadth,) would havo constituted a 
promenade for tho public, communicating by tho 
easiest gradients,—at ono end with the height of 
“ Darlinghurst,” at the other, along a level road,—• 
with the beautiful rides, drives, and walks, i. n Jjhe 
“ Domain,” from which it would have been divided 
merely by a gate; and should the waters of this 
beautiful bay be still as hitherto used as a bath, then 
the same kind of Gutta Perche water fence would 
have been also in requisition. 
(To be continued next month.) 
The following paper was read by His Ex¬ 
cellency, Sir William Denison, K.C.B.,on 
THE MOON’S NOTATION. 
At tho last mooting of tho Society a question was 
raised in the course of conversation, as to tho evi¬ 
dence which wo possess of tho rotation of the Moon 
on its Axis, and it was asserted by some of tho Mem¬ 
bers, that the phenomena connected with tho motion 
of the Moon round the Earth, and especially tho fact 
that in her monthly revolution she always presents 
the same face to the Earth, do not afford sufficient 
evidence of this rotatory movement upon an Axis. 
As this is a question which has excited some inter¬ 
est in England, it may bo as well that a better, or 
at all events, a more clear and formal explanation 
should be given of the facts connected with the mo¬ 
tion of the Moon than could bo done in the course 
of tho conversation at the last meetine ; and this 1 
propose now to attempt to lay before tho Society. 
In tho first placo it is desirable that a clear idea 
should be formed of the meaning of the terms used, 
before wo begin to reason upon tho facts which 
these terms are supposed to embody. The terms to 
which I especially allude aro Notation and ltevolu- 
tl °Ko , 'ation in tho sense in which I propose to employ 
the term (which I believe to bo that which 13 ordi- 
narilv signified by il) means tho movement of any 
body round somo lino imaginary or real within such 
body. A Wheel rotates upon its Axle ; the Earth 
rotates around an imaginary Axis, passing from 
Tole to Pole; and if reference bo made to any par¬ 
ticular point on tho surface of such body, that point 
is said to havo an angular motion round such centre 
^bacl^ 
