•CHEMICAL DATA FOR THE ROCKS OF THE ENGLISH LAKE DISTRICT. 
BY ALFRED HARKER, M.A., F.R.S., F.G.S. 
The following notes are intended to give a complete record 
of chemical work to the present date on the rocks of the English 
Lake District, that name being employed in an extended sense 
to include the Lake District proper, together with the Lower 
Palaeozoic inliers of Edenside, Sedbergli, and Ingleton, which 
belong to the same natural district. This compilation should 
have accompanied the Petrographical Notes prepared for the 
Keswick excursion, and published in the last number of these 
Proceedings (Vol. XIV., pp. 487-496), but it was not completed 
in time to be included there. Most of the items have appeared 
in an article published in ■ The Naturalist " for 1899, but I have 
now added a number of supplementar}^ references to bring the 
list down to date, and have rearranged the whole to correspond 
with the notes already published in these Proceedings. 
I give first a summary of the literature of the subject. Then 
follows the list of analyses, partial anatyses, and silica determ- 
inations, the silica j^ercentage being quoted in each case as 
the readiest means of identification. To each record is appended 
the name of the analyst and. in parenthesis, the reference to the 
original publication. In the case of a number of silica determ- 
inations made by students of Owens College and tlie Yorkshire 
<^ollege, under the superintendence of Dr. A. Harden and Dr. 
J. B. Cohen respectively, these latter names are cited as the 
authorities. 
References. 
(1.) Binney, Mem. Lit. Phil. Soc. Manch. (1871), Ser. 3, 
Vol. IV., p. 93. 
(11.) Ward, Quart. Journ. Geol. Soc. (1875), Vol. XXXL, 
pp. 408, 411. 
