424 Correspondence. 



water in the river there except in the hollows in a few places. I 

 examined the Churn, which flows into the Thames near Cricklade, 

 and found that river completely dry at South Cerney, and on de- 

 scending the stream to where the water from Boxwell Spring joins 

 the Churn I observed a considerable quantity of water flowing into 

 the Churn from Boxwell Spring. On visiting Boxwell Spring, 

 about a quarter of a mile up the brook from this junction, I found it 

 discharging about the usual quantity. I had sometime before ascer- 

 tained the flow of this spring, and did so at this time, and found the 

 discharge about one million one hundred thousand gallons in twenty- 

 four hours. The fact is that the water passing Water Eaton was 

 from the Boxwell Spring, and in passing over about three miles of 

 porous gravel and somewhat peaty soil there was a loss of one 

 hundred thousand gallons per day at that time. This loss would 

 eventually find its way into the Thames lower down the vale. It 

 may be observed that from the middle of August to the middle of 

 October scarcely any rain fell, and that which did fall was absorbed 

 immediately, and made not the slightest difference to the water in 

 the Thames. Our observations extended over forty-five days, from 

 the 24th August to the 8th of October, and during this period the 

 entire supply of the Thames above Water Eaton ceased, except what 

 was supplied by Boxwell Spring." Mr. Bravender concluded by 

 giving an account of the loss of water in the Churn by percolation, 

 being the results obtained by a series of experiments in 1859, show- 

 ing a loss of upwards of three millions of gallons per day. The loss 

 of water descending the Coin is much greater than that of the Churn. 

 Two other papers followed ; first, some notes by Mr. John Jones, 

 " On Drybrook section in the Forest of Dean ; " second, " On the 

 Denudation of the Cotteswolds," by Mr. E. Mitchell. — Wilts and 

 Gloucestershire Standard, June 29th, 1867. 



m 



ooI^I^:H]SI=OI<^3D:ElIs^CE. 



FISH-EEMAINS FEOM THE NOETHUMBRIAN COAL-FIELD. 



To the Editor of the GBOiiOGicAL Magazine. 



SiE, — The haste with which the critic (in Geol. Mag., August 

 p. 378), not waiting for the 'paper,' has assailed the 'abstract,' ir 

 the July number, p, 323, would seem to show him moved by some 

 smaller feeling than the desire to know a little more about the fossils 

 of the coal. Howsoever that may be, any remarks which Mr. 

 Atthey, after perusal of the paper and inspection of the fossils 

 therein described, may have to offer will meet with due and respect- 

 ful attention from me. I would, meanwhile, request your readers 

 kindly to suspend their judgment; and I appeal to them, not so 

 much on my own account, but lest they should attach to the words, 

 " a short time ago " (p. 378), a meaning diff'erent from that which 

 Mr. Atthey, speaking from knowledge, must entertain. In justice to 

 Mr. T. Craggs I have to state that I have been favoured by receiving 



