DETAILED ACCOUNT OF SOME RECENT EXPERIMENTS. 77 



Mr. Reader, Mining Specialist of the Geological Survey of India, 



has brought to my notice an occurrence that took place during some 



trial borings for coal in the Rampur coal-field in the Central Provin- 



R ■ . ., D ces. A flow of water issued from one of these 



coring in the Rampur 



coal-field. situated near the Eeb river, forming a jet that 



rose above the surface. The occurrence was related to Mr. Reader 

 by Messrs. Kilburn & Co., who put down the boring, but it had 

 taken place previous to the detailed examination of the district, and 

 the exact structure of the surrounding rocks has not yet been ascer- 

 tained. 



The following information contained in a letter from Mr. C. 

 Matthews, Engineer o£ the Diamond Drill Agency, Radhnagur, 

 dated 17th August 1900, has been kindly communicated by Messrs. 

 Kilburn & Co. : " Water commenced flowing from bore-hole at 

 Dhoramanda at about 80 feet from surface, and greatly increased at 

 depth of 120 feet, after passing through coarse grey free sandstone, 

 and the water kept flowing continuously at about 600 gallons per 

 hour, or equal to a discharge of a 1 \" bore piping. In a trial to 

 note to what height the water would rise above the bore-hole, two 

 lengths of boring rods were connected to pulley head, and water 

 rose full 20 feet height and kept overflowing. When the height 

 was increased to 30 feet the water did not overflow. But this may 

 be due to the water escaping below the casing tubes and working 

 through the porous loose soil, and consequently the water could not 

 accumulate as fast as it escaped through the soil, to gain sufficient 

 head to overflow above 20 feet. 



" The diameter of hole is about 4" to a depth of 40 feet, and from 

 that depth to 830 feet it is 2" practically. The top of bore-hole 

 was lined to a depth of 26 feet from surface, and below this depth the 

 stratum was firm to withstand the sides from erosion or falling in. 



" The position of bore-hole is in a valley between two ranges of 

 hills, the height of the hills would not appear more than 80 to 130 

 feet above that of the bore-hole. 



( 77 ) 



