98 



On the Indian Pendulum-observations. 



[Nov. 24, 



His Grace with any suggestions that may occur to them with reference to 

 supplementary measures that may appear necessary in order to complete 

 the operations which were commenced at the suggestion of General Sabine, 

 and with the concurrence of the Council. 



I am, Sir, 



Your obedient Servant, 



J. Cosmo Melvill. 



The Secretary to the Royal Society. 



Enclosure No. 1. 

 Government of India, Home Department — Geographical. 

 To His Grace the Right Honourable the Duke of Argyll, Kt., Her 

 Majesty's Secretary of State for India. 



Simla, the 26th of August, 1870. 

 My Lord Duke, — Referring to Sir Charles Wood's despatch in the 

 Military Department No. 271, dated the 23rd of August, 1864, authorizing 

 the carrying out of certain pendulum experiments in connexion with the 

 operations of the Great Trigonometrical Survey of India, at the re- 

 commendation of the President and Council of the Royal Society, we have 

 the honour to transmit, for your Grace's information, copy of a letter from 

 Colonel Walker, No. 49-793, dated the 11th instant, together with its 

 enclosures, showing what has been done and what remains to be done to 

 complete the original programme. 



2. With reference to the last paragraph of Colonel Walker's letter, 

 we beg that the President and Council of the Royal Society may be 

 invited to suggest, at an early date, any supplementary measures which 

 they may consider desirable. 



We have the honour to be, 



My Lord Duke, 

 Your Grace's most obedient, humble Servants, 

 Mayo. 



Napier of Magdala. 

 John Strachey. 

 R. Temple. 

 J. F. Stephen. 

 B. H. Ellis. 

 H. W. Norman. 



Enclosure No. 2. 



From ColonelJ. T. Walker, R.E., Superintendent Great Trigonometrical 

 Survey of India, to the Secretary to the Government of India, Home 

 Department, Simla. 



Dated Mussoorie, llth August, 1870. 

 Sir, — I have the honour to report that the pendulum-observations 

 which have been carried on since the year 1865, by Captain Basevi, in con- 



