THE TIDES. 173 



(Fig. 26) traced by that machine during a week 

 is exhibited. 



After the observations have been taken, the next 

 thing is to make use of them. Hitherto this has 

 been done by laborious arithmetical calculation. I 

 hold in my hand the Reports of the late Tidal 

 Committee of the British Association with the 

 results of the harmonic analysis about eight years' 

 work carried on with great labour, and by aid of 

 successive grants from the British Association. 

 The Indian Government has continued the har- 

 monic analysis for the seaports of India. The 

 Tide Tables for Indian Ports for tJie Year 1882, 

 issued under the authority of the Indian Govern- 

 ment, show this analysis as in progress for the 

 following ports, viz. : Aden, Kurrachee, Okha 

 Point and Beyt Harbour at the entrance to 

 the Gulf of Cutch, Bombay, Karwar, Beypore, 

 Paumben Pass, Madras, Vizagapatam, Diamond 

 Harbour, Fort Gloster and Kidderpore on the 

 River Hooghly, Rangoon, Moulmein, and Port 

 Blair. Mr. Roberts, who was first employed as 

 calculator by the Committee of the British Asso- 



