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ON EFFECT OF WIND AND ATMOSPHERIC PRESSURE ON THE TIDES. 503 ” 
The Effect of Wind and Atmospheric Pressure on the Tides. —Report 
of the Committee, consisting of Professor L. F'. VERNon Harcourt, 
Professor Unwin, Mr. G. F. Deacon, and Mr. W. H. WHEELER 
(Secretary). (Drawn up by the Secretary.) 
Arrer the appointment of the Committee at the Meeting at Ipswich , 
a copy of the paper on the Effect of Wind and Atmospheric Pressure, read 
at the meeting at Ipswich, was sent to the authorities of all the principal 
ports in the Kingdom ; and also through the Foreign Office to the Hydro- 
graphic Departments of the principal maritime ports abroad. The paper 
was accompanied by a letter asking on behalf of the Committee for | 
any information as to the records of tides affected by gales or in any way 
bearing on the subject dealt with in the paper, and a form showing the 
information required. 
To these communications a large number of replies were received 
expressing the willingness of the senders to co-operate in the inquiry as 
far as possible. In the great majority of cases, however, the records of 
the tides at the ports and of the meteorological conditions were not kept 
in such a manner as to be useful in affording the information required. 
Five ports were selected as fairly representing the tidal conditions 
round the English coast. The tidal records of these ports were freely 
placed at the disposal of the Committee : those at Liverpool for the tides 
by Mr. M. A. Sweney, R.N., the Marine Surveyor, and for the barometer 
and wind by Mr. W. E. Plummer, of the Bidston Observatory, with the 
consent of the Mersey Docks and Harbour Board ; those for Sheerness 
and Portsmouth by Admiral Wharton, Hydrographer of the Admiralty ; 
and those at Hull by Mr. E. Lake, the Manager of the Hull Docks of the 
North-Eastern Railway Company. Those for Boston are from the register 
of tides kept by Captain Hudson, the Harbour Master. 
Mr. Deas, on behalf of the Clyde Navigation Trustees, furnished 
diagrams and particulars of the principal gales which occurred on the 
Clyde during the last few years. 
The Government of India, through the Secretary of State for India, 
offered to place at the disposal of the Committee the records of the tides - 
observed at the several ports, and also forwarded a copy of the Handbook 
of Cyclonic Storms in the Bay of Bengal. The time available has rendered 
it impossible as yet to make use of this information. 
The Norwegian Government forwarded for the use of the Committee 
five volumes containing tables relating to tidal and meteorological 
conditions on the coasts of Norway. These volumes contain a large 
amount of valuable information, but there has not been time as yet to 
make use of them. 
Copies of the Reports for 1894, 1895, 1896, prepared for the Canadian 
Government, on the ‘ Tides and Currents in Canadian Waters,’ have also 
been sent by Mr. W. Bell Dawson, C.E., the Engineer in charge of the 
Tidal Survey. ' 
A copy of ‘De Ingenieur’ of September 26, 1891, published at the 
Hague, containing an article by M. E. Engelenberg, C.E., on the ‘ Influence * 
of the Wind both in Direction and Pressure upon the Sea Level,’ was sent 
for the purpose of assisting in this investigation by M. Ortt, of the He 
