340 On the Structure of the Delta of the Ganges. 



which I have obtained much interesting information and 



assistance. 



R. BAIRD SMITH, 



Lieut. Bengal Engineers. 

 Calcutta, 20th June, 1840. 



NOTES. 



Note A. — List of the various Boring Experiments made at Calcutta, 



from 1804 to 1840. 



(From Committee's Report 1 833 with additions. J 



No. 



Superintending 



Date. 



Locality. 



Depth 



Cause of 





Officers. 







attained. 



failure. 











Foot. 





1 



Colonel Garstin 



Dec. 1804 



Well near Powder Mag. 



75 





2 



Ditto. 



Aug. 1805 



SW. of Arty. Barracks. 



119 



Auger broke. 



3 



Ditto. 



Sep. „ 



SE. of Regt. Parade. 



55 



Ditto. 



4 



Ditto. 



Oct. „ 



SE. of European Barks. 



59 



Ditto. 



5 



Ditto. 



Nov. „ 



SW. of Artillery Parade. 



80 



Ditto. 



6 



Ditto. 



Dec. ,, 



Ditto. 



127 



Ditto. 



7 



Ditto. 



Feb. 1806 



Ditto. 



94 



Ditto. 



8 



Ditto. 



March „ 



Ditto. 



124 



Earth fell in. 



9 



Ditto. 



April „ 



Same operation resumed 



127 



Auger broke. 



10 



Ditto. 



May 1814 



SE. of Artillery Parade. 



140 



Suspended by 



11 



Ditto. 



Nov. „ 



Same resumed. 



136 



rams. 

 Auger broke. 



12 



Ditto. 



May 1819 



On Artillery Parade. 



130 



Ditto. 



13 



Ditto. 



Apl. 1820 



Ditto, 



122i 



Ditto. 



14 



Ditto. 



May „ 



Near Triangular Barks. 



128 



Earth fell in. 



15 



Win. Jones. 



1815 



Not specified. 



70 



Spring found. 



16 



Doctor Strong. 



1826-28 



Circular Canal. 



70 



Ditto. 



17 



Ditto. 



Ditto. 



South West Lake. 



40 



Ditto. 



18 



Ditto. 



Ditto. 



Near Circular Road. 



70 



Hard Kankar. 



19 



Ditto. 



Ditto. 



At Russa Paglah. 



70 



Earth fell in. 



20 



Ditto. 



1832 



Lock Gates Chitpore. 



70 



Water rose. 



21 



Strong, Ross 

 and Kyd. 













1830 



Near Fort Church. 



176 



Shaft injured. 



22 



Ditto. 



1832 



Near St. George's Gate. 



164 



Earth fell in. 



23 



Ditto. 



1833 



Ditto. 



170 



Auger broke. 



24 



Boring Com. 



1835 



Chief Engineer's Yard. 



150 



Tubes deflected. 



25 



Ditto. * 



1836-40 



Ditto. 



481 



Jumper jamed & 

 rods broken. 



Note B. — Analysis of the Peat of the Calcutta Alluvium. 



Volatile matter chiefly aqueous, - - - 62-0 

 Fixed Carbonaceous matter, ----- 16-7 

 Red ash, 21-3 



100. 



J. Frinsep. 



Colonel D. McLeod, Chief Engineer, President. 

 Major Irvine, C.B., Engineers. 

 Captain Fitzgerald, ditto. 

 Doctor Strong. 



