Harker: Chemical Notes on Lake District Rocks. I51 
I have shown that this rock varies in a very remarkable degree 
in different parts of the mass.* Hughes’ silica-percentage is 
given here under (81) and Tate’s under (82). My paper contains 
two analyses by Mr. G. Barrow (83) and (92), and eight deter- 
minations of silica-percentages, (84) to (91). Of these Nos. (85) 
to (89) were made by Brend and Cunningham Craig ; (84), oy 
and (91) by students of the Yorkshire College of Science. 
regards analysis (92), it may be observed that, as eae a in 
the Quarterly Journal, it is incomplete. The missing con- 
stituents are alumina 20°64 (probably too high), lime 4°30, soda 
3°18, potash traces, ignition (sulphur) 3°00. To the gabbro 
I append two of the small dykes and veins which intersect both 
that rock and the adjacent granophyre. Of these (93) is from 
a complete analysis by Mr. R. H. Adie,t and (94) is a silica- 
percentage from the Yorkshire College. t 
(81). 56°656. Carrock Fell gabbro, White Crags. 
(82). 53°9. Carrock Fell gabbro. 
(83). 53°50. Carrock Fell gabbro, roadside, 150 yards N.N.W. 
of Chapel Stone; sp.gr. 2°800. 
(84). 50°0. Carrock Fell gabbro, same locality. 
(85). 59°46. Carrock Fell gabbro, White Crags; sp.gr. 2°804. 
(86). 57°7. Carrock Fell ety 350 yards S. of White 
Crags: ep.er. 2°877) 
(87). 50°22. Carrock Fell gabbro, 00 yards S.W. by S. of 
White Crags; sp.gr. 2°939. 
(88). 47°11. Carrock Fell tte 120 yards N. of summit of 
White Crags; sp.gr. 2°848. 
(89). 44°14. Carrock Fell gabbro, oe of cliff above Mosedale, 
S. edge of mass; sp.gr. 3°103. 
(90). 43°4. Carrock Fell gabbro, gill 34 an N. a of Swine- 
side, S. edge of mass; sp.gr. 2°95 
(91). 33°4. Carrock Fell gabbro, mee at ae Sonhergill; 
; . edge of mass; sp.gr 
(92). 32°53. Carrock Fell gabbro, upper st of Furthergill, 
. . edge of mass; sp.gr. 3°265. 
(93). 53°63. Spherulitic tachylyte vein cutting Carrock Fell 
gabbro; sp.gr. 2°99. 
(94). 59°8. Variolilie Gadesite dyke cutting Carrock F ell 
granophyre; sp.gr. 2°763. 
* Quart. Journ. Geol. Soc., vol. 1., pp. 311-336, 1894. 
+Groom, Quart. Journ. Geol. Soc., vol. xlv., p. 298, 1889. 
+ Harker, Geol. Mag. for 1894, p. 553. 
May 1899. 
