CO129-204 - Acting Governor Marsh - 1882 [11-12] — Page 413

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