Geological Queries regarding the Stratu of Durham, &c. 45 
days the whole turf was completely dead, and when removed 
from the receiver possessed a very offensive and putrid smell. 
The second turf, which was exposed to carbonic acid gas, be- 
trayed signs of decay on the second day, similar to the above, 
but not so quick: on the fifth day this turf was completely dead. 
The third turf, which was inclosed in atmospherical air during 
ithe above time, did not appear altered, except that the grass 
had grown considerably higher than when first introduced. 
We have here further corroborating proofs of the agreement 
of the animal and vegetable kingdoms in the points under ex- 
amination. We proved in our former experiments that vege- 
tables, like animals, convert the oxygen of the atmosphere into 
carbonic acid gas; and in these latter experiments we find that 
those very gases which are fatal to animals are equally so to ve- 
getables. 
I could extend this paper to a much greater length, by se- 
lections from my Journal of the effects of fruits, fowers, new-cut 
grass, &c. on the atmosphere ; in all of which the air of the at- 
mosphere was much injured, and in most cases the whole of the 
oxygen was converted into carbonic acid gas in a few days. But 
fearing that I have already trespassed on the limits of your pub- 
lication, I conclude, 
Yours, &c. . 
Dorset-street, Salisbury-square, J. Tatrum: 
July 10,1817. © 
VII. Geological Queries to Mr. Wesrcartn Forster, Mr. 
Wincn, Mr. Frayer, &c. regarding the Basaltic and other 
Strata of Durham, Northumberland, &c. Sc. By A Cor- 
RESPONDENT. 
To Mr. Tilloch. 
Sir, — Ir has given me sincere pleasure to observe at length, 
Mr.Westgarth Forster, becoming a Correspondent in your very 
useful Magazine ;—I hope that in future he will become, like 
myself, a constant reader of your Work, and that he will often 
repeat his communications thereto, on Geological and Mining 
subjects. I beg to thank him for his attention, in p. 401 of 
your last volume, to two of my Queries, in p. 108 of your xlvth 
volume, and to request his early attention™, to several further - 
* I presume to hope and request, that some regular Subscriber to your 
Magazine, who may be in habits of intimacy with Mr. W.F., or who may 
live near to him, will early inform him of the request now made, and pro- 
mote his reply, by the offer of the loan of their copy of your Work, for 
such purpose. : 
Queries 
