52 J. Waterhouse — Tidal Ohservntions in the Gulf of Ciitch. [No. 1, 



should pass tlirough the Local Governments, but this point may be settled 

 as may be found most expedient in practice." 



In accordance with these orders, enquiries have been, and are being 

 made, with a view to ascertain the ports at which it will be desirable to 

 establish tidal stations. The suitability of a port for this purpose will 

 deiDend,^r5^, on a site being available thereat, on which a self -registering 

 tide-gauge may be erected, so as to be either immediately over the sea, or 

 connected by piping with the sea at some point where there is a depth of 

 not less than 10 to 15 feet of water at the lowest tides ; secondly, on the 

 presence of a port officer, who will exercise a general supervision over the 

 operations, and correct the clocks of the several self-registering instruments, 

 whenever necessary, either by direct determinations of time, or by arrang- 

 ing to get the true time from the nearest telegraphic office ; thirdly, on the 

 feasibility of making arrangements for the periodical inspection of the 

 instruments at intervals of not less than six months generally, and more 

 frequently when no officer is resident on the spot to superintend the 

 oi^erations. 



So far as has yet been ascertained, the ports which seem likely to 

 answer all the required conditions are Aden, Kurrachee, Bombay, Carwar, 

 Beypore, Paumben, Madras, Vizagapatam, Akyab, Rangoon, and Port 

 Blair. The following ports are believed to be unsuitable : Surat, Mangalore, 

 Cannanore, Cochin, Muttrun, Negapatam, Coconada, False Point, Diamond 

 Harbour, Moulmein, and Mergui. 



At Aden a self -registering tide-gauge was erected by the local officers 

 about two years ago ; but the registers have been taken in such an unsatis- 

 factory manner that the results are not of the slightest use. Captain Baird 

 is now arranging for the establishment of a tidal station there, with proper 

 instruments, and trained men to take charge of them. At Kurrachee a 

 tide-gauge, which was originally set up by Mr. Parkes, has been in work 

 for several years, and has furnished the data from which tide-tables for the 

 port have been computed annually by Mr. Parkes. In course of time the 

 present gauge — the scale of which is very small — should be replaced by one 

 of those which are used by Captain Baird, and an anemometer and a baro- 

 meter (both self -registering) should be set up beside the gauge. But it is 

 not desirable to interfere with the working of the present arrangements at 

 Kurrachee until other ports, at which nothing is now being done in the 

 way of tidal observations, are duly provided for. At Bombay, Carwar, and 

 Madras, instruments are now being set up by Captain Baird. 



