126 Correspondence. 



Perhaps the bad effects resulting from the use of the 

 water No. II is caused by the excess of salts in it. The 

 specific gravity is not however great; I make it 1*0001011, 

 but this is only to be reckoned an approximation, my balance 

 not being very delicate, and must vary according to the 

 period at which the water is drawn from the well. The 

 Sullempoor water appears to contain the same ingredients, 

 though in less quantity, which is shewn as well by its being 

 less affected by the re-agents as by its being lighter, but 

 neither is it quite innoxious, there are cases of swelled neck 

 in the village, though not many. 



It might be worth while to have the water No. II minute- 

 ly examined, in which case the evil ingredient might be 

 detected. I may mention that sujy (carb. soda) is reckoned an 

 antidote to its injurious effects. I have heard of one case 

 where a goitre was removed by the continued use of this salt 

 in the water when drank, and of another in which a person 

 affected in like manner had the swelling partially discussed 

 by residing a month or two in a quarter where sujy abounds 

 in the soil. 



Notice of three Trap Dykes in the JBurdwan district, and of the effect pro- 

 duced by them on the coal which they pierce. Extracted from a letter 

 of Mr. Mornay, dated March 7th, 1841.* 



In all the accompanying diagrams, the same signs represent the 

 same things, viz. 



d the Dyke, 



c the Coal. 



The striated part of the diagram represents that part of the coal which 

 is of a different character from the rest of the bed. 



The corresponding specimens from the different localities are 

 marked with the same letters, and have numbers besides to dis- 

 tinguish them : thus c. 1 ; d. 1 ; are from the dyke represented in 

 fig. 1, &c. 



* The specimens which accompanied this communication are deposited in 

 the Coal Committee's collection — Ed. 



