1878. ] Ohservations in tlie Gulf of Cutch. 39 



ties of which were 860 to 890 miles daily, for several days preceding the 

 misadventure. This accident necessitated the suspension of the registra- 

 tions at Nawanar until such time as the piping could be extracted and 

 again put into communication with deep water. It was expected that the 

 original configuration of the foreshore would probably be restored by natural 

 causes, when the wind veered round to the usual direction, soon after the 

 commencement of the cold-weather months ; but this expectation was dis- 

 appointed, and as the cold season wore on it became only too certain that 

 the piping which lay beyond the low- water line would never be recovered. 

 A supply of new piping was therefore obtained from Bombay and attached 

 by Mr. Rendell to the land portion of the original pipe ; and by the com- 

 mencement of March 1875, after a break of 9 months' duration, the tide- 

 gauge was once more in free communication with the sea, and there appeared 

 to be every probability that it would so remain at least till the setting in of 

 the next monsoon. 



But within a fortnight after the re-starting of the tide-gauge at Nawa- 

 nar, the foreshore again shallowed, and the new piping was covered with a 

 deposit of silt and mud, nearly up to the level of the rose at its outer ex- 

 tremity. Mr. Rendell at once cut away the flexible piping and substituted 

 several lengths of iron piping, supported by being attached to stakes driven 

 vertically into the ground. By remaining on the spot for two months, 

 taking measures to prevent the rose from being reached by the constantly 

 rising mud and silt, Mr. Rendell succeeded in securing satisfactory and 

 continuous readings for the whole of the time, and he checked them occa- 

 sionally by hourly readings taken pari passu on a graduated staff, which had 

 been set up in the sea in deep water, in order to afford a means of verifying 

 the indications of the self -registering gauge. The station of Nawanar has 

 thus been proved to be unsuitable for continuous tidal observations, exten- 

 ding over a long period, for it is only during the months of fine weather 

 between November and May, that observations can be carried on there, 

 otherwise than by setting up the tide-gauge on a staging erected for it out 

 in deep water, the cost of which would be inadmissible. 



I*reliminary Results. — The preliminary results of the observations up 

 to September 1874, as worked out by Capt. Baird, show that the greatest 

 range of the tide was — 



14-8 feet at Okha. 

 19*6 ,, Nawanar. 

 21-2 „ Hanstal. 



or two to four feet more in each instance than the ranges given in the 

 marine Charts. 



Very fairly approximate values of the progress of the tidal wave, up 

 and down the Gulf, have also been obtained, showing that — 



