408
marine works of all sorts, and the table will
also be of great use to dock-mablers and
to the shipping interest generally.
The cost of the Tables will be as follows:-
Analysis of observations and
of
Computations "Constants"
serving for prediction
£3500
Prediction of tides from the
"Constants" by means of machine
tabulating results, printing &
binding 300 copies of Tide Table $25 · 0-0
Fee to India Office for uscoftide
predicting machine.
Total cost of 300 copies of tide-600k
0
£ 62
2
I beg to suggest that the above notes
be submitted to the Surveyor General for his
opinion, as to whether the utility of
the
information to be obtained does not fully justify the expenditure.
"The "constants" once determined
with
accuracy, serve to predict the tides,
unlimited number.
Cost
of
the
£24.2.0
for
aru
of years, so that the future.
rs tide - tables will be best years
For the determination of the "Constants”
observations extending over a year, or rather. 369 days, are desirable, but not absolutely
necessary, for I have the authority of Sirts. Thomson.
for asserting that they can be determined from
one months observations only.
If therefore, the data now in my
possession be submitted at once to m? Roberts
for analysis, it appears certain that a tide -
book 1883 can be prepared and sent out
for
to Hong Kong by the new year.
If
on the other has. I the work be delayed
till a complete year's observations be made
and received, the tide book cannot well be
published till 1884 for it will scarcely desirable
to publish one, for a part of a year only.
with
assume