ON T1IE HARMONIC ANALYSIS OF TIDAL OBSERVATIONS. 35 



has been done to remedy this defect, and that the instrument has remained 

 unused during several years. 



On the whole we may congratulate ourselves on the amount of activity 

 which is being displayed in the matter of tidal research, and we may 

 hope that in a few years we shall be in possession of a large mass of tidal 

 information, arranged in a form which will lend itself satisfactorily to 

 theoretical examination. 



As we already have a considerable amount of data with regard to India, 

 extending over several years, I have requested Major Bairdlo supply me 

 with the values of mean water-mark for a series of years, and I am in 

 hopes that au examination of these results will give us the amount of 

 the nineteen-yearly tide, if not with great precision, at least with some 

 degree of accuracy. The result will be of much interest for the purpose 

 of evaluating the degree of elastic yielding of the earth's figure. 



A few errata have been detected in the Report of 1883, but only one 

 of them has any importance, viz., that in Schedule [I], as noted below. 

 The corrections to be made are as follows : — 



1. First of (40), for R 2 read R. 



2. First of (43) and second of (44), multiply the expressions on the 



right by — 

 jj . 



3. First of (5G), multiply the numerator by h 2 . 



4. Schedule [I], entries K 2 , K,, third column, multiply the numera- 

 tors 1-46407 by 1c. This important error arises from the mistakes (2) 

 aud (3). 



5. After (67), in the next transformation, the Vs which occur before 

 Oi + l 2 )i and (l\—h)i, are to be deleted; the subsequent analysis is 

 correct. 



Report of the Committee, consisting of Professor Balfour Stewart 

 (Secretary), Mr. Knox Laughton, Mr. Gr. J. Symons, Mr. R. H. 

 Scott, and Mr. Johnstone Stoney, appointed for the purpose of 

 co-operating with Mr. E. J. Lowe in his project of establishing 

 a Meteorological Observatory near Chepstow on a permanent and 

 scientific basis. 



Me. R. H. Scott and Professor Balfour Stewart have been in corre- 

 spondence with Mr. Lowe, and the former has seen the site of the 

 proposed observatory, which appears to him to be good. Professor 

 Stewart purposes visiting the site at the end of July, and reporting the 

 result of his visit to the other members of the Committee. Meanwhile it 

 is proposed that the Committee be reappointed, with power to add to 

 their number, but without any further sum bein£ placed at their 

 disposal. 



D2 



