New Process fur Emetic Tailor. -30,' 



Imt, I believe, it would not be very easy to collect the fact from 

 -his writings. As far as I yet know, my clescri]nion of the forma- 

 tions in the neighbourhood of Bristol contained the first and 

 most distinct information as to tlie unconformable position of the 

 beds of the red ground over the inclined coal measures ; and at 

 this moment it is peculiarly gratifyiiig to me to state, that Pro- 

 fessor Jameson, while lecturing during the course of last week, 

 upon coal, did me the honour to allude to my paper, and at the 

 same time mentioned me, as having first observed the real posi- 

 tion of the red ground, in regard to, the coal .and its accom- 

 panying strata. 



As Mr. Farey plumes himself so much upon his practical 

 knowledge, and as he seems to have seen so much of the red 

 ground, I cannot but l)e surprised that he ha? been so long in 

 the dark as to the beds of the red ground overlying the tops of 

 the inclined strata. This formation must have very dififerciit 

 characters in the country where that gentleman has seen it, from' 

 those which it exhibits in the district which has been the sub- 

 ject of my examination. There the most incurious observer 

 could not but remark, in very many places, the beds of the red 

 ground, that is to say, the coarse breccia, the red calcareou^ 

 sand-stone, and sometimes a loose clay-stone abounding with 

 gvpsum, occurring in an unconformable situation, sometimes ovef 

 the coal measures, and at other times over the inclined rocks 

 that inclose the coal tract. These remarks, I believe, will be 

 sufficient to show that Mr. Farey has claimed what he has not a 

 fraction of a right to ; 1 shall therefore conclude by subscribing 

 myself. 



Sir, 



Very respectfully yours. 

 Surgeons Square, Edinburgh, W. H. GlI-BY. 



April 12, 1815. 



p. S. — Want of leisure has prevented me from sending you 

 some additional remarks upon the stratification in the vicinity o-f 

 Bristol, as also some observations respecting the red ground, the 

 red sandstone, and the point to which, in the Wernerian system, 

 the Bristol formations are to be referred. These I hope soon to 

 submit to you. 



LV. Mr. Hume's New Process for Emetic Tartar. 

 To Ml'. Tilloch. 



Sir, — About two years ago, I was requested by some mem- 

 bers of the Royal College of Physicians, to turn my thouglits to 



