246 



Having alluded to the great loss in the Churn, by passing 

 over the porous rock of the Under Oolite, I may be excused for 

 quoting a table of the results obtained in 1859 ; and I do so 

 with the greater confidence, because those results were obtained 

 from a series of observations made by myself and assistants, 

 extending over a period of six weeks. 



At tlie Seven Springs the flow was 11 cubic feet per minute. 

 At 5 mile below the Springs the flow was 31 cubic feet per minute. 



61 



1 

 2 



4f 

 5h 



73 

 105 

 165 

 312 

 320 



At this point, however, the volume of the river, instead of 



increasing, began to diminish, for — 



At 6| miles from the Spring the flow had decreased 290 cubic ft. per minute. 



„ 235 



„ 179 



„ 113 



45 



33 



12i 



30 



In conclusion, I have only two more observations to make, 

 and I hope to be excused for making them. One is, that the 

 loss of water in descending the Coin, is much greater than the 

 loss to the Chum; and I have no hesitation in stating that if 

 this river (the Coin) were thoroughly puddled, as Mr. Simpson 

 recommended in 1859, in the case of the Chum, that Syreford 

 Spring might be sent down to Cheltenham, and the abstraction 

 of the water would not be felt at Foss Bridge ; and it would be 

 an immense boon to the inhabitants of that badly- watered town. 



There has been a doubt as to the soiu'ce of the spring called 

 the Thames Head. The Eev. Mr. Clxjtterbuok appears to think 

 it is derived from the Oxford Clay, and others from the Forest 

 Marble ; but I have for many years considered the Watershed 

 of the Forest Marble to be totally inadequate for the supply of 

 so large a quantity of water as is pumped up by the Thames 

 Head engine, and that the source of this spring must be the 



