1857.] Beport on the Progress of the Magnetic Survey. 55 



I started from Jubbulpore on the 6th of January, and went by 

 Mundlah, Eamgurh, Goruckpore and Karenehia up to Umerkuntuk 

 which forms a very important part of the water-shed of Central 

 India. Near it are the sources of the Soane and Tohilla, of the 

 Nerbudda, and of the Yrap, an affluent of the Mahanuddy. 



I arrived at Umerkuntuk on the 20th of January, 1856, and 

 having set up my meteorological instruments, which were regularly 

 registered during my stay, I made excursions to the sources of the 

 Tohila and Soane, and up to the summit of Rajmeergurh Hill, which 

 is one of the highest points of the Mekul range, East of Umerkun- 

 tuk. 



The plateau of Umerkuntuk afforded me a favourable opportunity 

 of making physical and meteorological experiments, and though the 

 absolute elevation is not very considerable (3,290 to 3,330 English 

 feet,) the data obtained for the decrease of the temperature of the air, 

 and of the ground, &c, may not prove without some interest for the 

 physical geography of Central India, when compared with similar data 

 obtained in the Himalayas, the Neilgherries, and Khasia Hills, &c. 



I left Umerkuntuk on the 26th January, and proceeded via Pain- 

 dra, Moonda, and Amukpore to Sohagpore ; thence in a Northerly 

 direction, through Kanrodi and Ramnuggur, crossing the Soane 

 River twice, to Rewah, where I arrived on the 11th of February. 



By Mungown and Sohagi, I went to Allahabad, and thence along 

 the Grand Trunk Road to Agra, where I arrived on the 21st of 

 February. 



At Agra the whole of the collections sent down last year from 

 the Himalayas, and those made during this cold season, were care- 

 fully re-packed for the purpose of being sent to England. 



I left Agra on the 8th of March, and travelled via Delhi to Saha- 

 runpore, and thence to Nahun, where I' was engaged, for several 

 days, examining the geological structure of the Sewalik range. I 

 obtained many interesting tertiary fossils from various localities in 

 the Sewaliks. 



I marched through Dugshaie to Simla, where I arrived on the 

 25th of March. 



The observations made in the outer ranges of the Himalayas, and 

 in various localities in the environs of Simla, will be reserved for 

 the next Report, treating of the Himalayas. 



