64 iiarker: chp:mical data fou lake district rocks. 
(46) . 69.673 (anal.). Tuff, partly metamorphosed, Base Brown, 
near Borrowdale : Hughes (III.). 
(47) . 68.421 (anal.). Metamorphosed breccia, Slight Side, near 
Eskdale : Hughes (III.). 
(48) . 69.48 (silica). Compact rock with lenticular streaky 
structure, X.E. slope of Illgill Head, Wastwater : 
Harden (XXIII.). 
(49) . 66.95 (silica). Crushed garnetiferous lava, Frith Wood, 
Rosthwaite, Borrowdale : Garwood (XXIII.). 
The three rocks next following are of acid composition, 
though intercalated in the basaltic group. 
(50) . 73.45. Rliyolite, upper part of Measand Beck, Hawes- 
water : Garwood (XXIII.). 
(51) . 82.25. Rhyolite, somewhat altered, ^ mile S.E. of Walla 
Crag, Haweswater : Garwood (XXIII.). 
(52) . 76.95. Breccia, Fritli Wood, Rosthwaite : Garwood 
(XXIII.). 
ScAWFELL Tuff and Breccia Group, with the Kentmere- 
CoNisTON Slate-Band. 
(53) . 56.60 (silica). Hornstone (altered fine tuff), Hanging 
Knott, Bow Fell : Garwood (XXIII.). 
(54) . 63.1 (silica). Hornstone (altered fine tuff), upper part 
of Eskdale : Harden (XXIII.). 
'(55). 58.69 (anal.). Andesite, Thorntliwaite Crag : Cohen 
(XIV.). 
(56) . 66.59 (silica). Dark garnetiferous rock, a little south of 
summit of Scawfell : Harden (XXIII.). 
(57) . 69.22 (anal.). Cleaved tuff (ash-slate), insoluble portion, 
Mosedale, near Shap : Patterson (XV.). 
(58) . 74.88 (anal.). Cleaved tuff (ash-slate), insoluble portion, 
below reservoir, Kentmere : Patterson (XV.). 
(59) . 61.75 (silica). Cleaved tuff (ash-slate), Grasmere, quarry; 
Patterson (XV.). 
<60). 77.40 (silica). Insoluble portion of the same rock : 
Patterson (XV.). 
