T 



ON THE UAllMONIC ANALYSIS OF TIDAL OBSKRVATIONS. 



oU 



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 wo already have a considerable amount of data with regai-d to India, 

 extending over seversil years, I have requested Major liaird to supply me 

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

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

 the ninetccn-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 W read R. 



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



right by ^- 



■Mo- 



3. First of (50), multiply the numerator by Jc.^. 



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

 tors 1'4(3407 by Jc. This important error arises from the mistakes (2) 

 aud (3). 



5. After (67), in the next transformation, the v,'s which occur before 

 (i'l+^a)'" ^nd {^\~^-iy> *^'^ to be deleted; the subsequent analysis is 

 correct. 



large 



10 the 

 with 



)lonie3 



lent at 

 tablish- 

 mc one 

 which 

 at the 

 )ken at 

 lothing 



Report of the Coinmlttee, consisting of Piiofessor Balfour Stfavart 

 (Secretary), Mr. Knox Laughtox, Mr. Gr. J. Symoxs, My. 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 Chepstoiu on a permanent and 

 scientific basis. 



Mu. 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 Co nmittee be reappointed, with power to add ta 

 their numbei', but without any further sum bein,^; placed at their 

 disposal. 



D 



