Notes on mineralogy. No. II. On the chemical composition of the granites of the south-east of Ireland / by Samuel Haughton.

  • Haughton, Samuel.
Date:
[1855]
Catalogue details

Licence: Public Domain Mark

Credit: Notes on mineralogy. No. II. On the chemical composition of the granites of the south-east of Ireland / by Samuel Haughton. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    Table 1.—Analyses of Granites from principal Cbain. Localities. Silica. Alumina. Peroxide of iron. (ft P a Potash. 1 .Soda. Loss by ignition. Totals. 1. 70-38 12-64 3-16 2-84 0-53 5-90 3-13 1 16 99-74 2. 7300 13-«4 2 44 1-84 0-11 4-21 353 1-20 99-97 3. Three Rock ... 70-28 16-44 2-60 204 trace 5-79 2-82 99-97 4. Euniskerry ... 74 24 13-64 1-40 1-48 trace 3-95 2-72 1-20 98-63 5. Ballyknocken... 70-82 14-08 3-47 2-65 0-31 4-64 2-31 1-39 99-67 6. Killballyhugh... 7324 15-45 1-60 0-99 trace 4-59 3-08 1 20 100-15 7. Blackstairs ... 73-20 15-48 1-72 0-96 trace 4-80 3-18 99-34 8. 73-28 1264 2-00 1-72 trace 4-70 2-97 104 98-35 No. 1. Dalkey.— Specific gravity, 2'617. A tine-grained gra- nite containing l)lack and transparent mica. This granite cannot be a ternary compound of quartz, felspar and inargarodite. This granite was used in the construction of Kingstown Harbour. No. 2. Foicrock.—Specific gravity, 2638. A coarse granite, which strikes fire under the hammer; it forms a durable and strong building stone, and has been employed in the ring stones of Trinity College belfry, and in the construc- tion of the O'Conneil monument at Glasnevin. No. -3. Three Rock.—Specific gravity, 2'G5.2. This granite is rather coarse-grained; it was taken from AVoodside Quarry, on the slope of the Tiiree Ilock Mountain, and like No. 2, has been used in the construction of the O'Connell monument. No. -J'. Enniskerry.—Specific gravity, 2-633. A rather coarse- grained granite, containing veins of black tourmaline. No. 5. Ballyknocken.—Specific gravity, 2-G3G. This granite is the best building stone in the neighbourhood of Dublin, and has been extensively used in the public buildings of this city; it forms the principal part of the granite used in the belfry and museums of Trinity College. The quarries are situated beyond Blessington, in the county of VVicklow. No. G. Killballyhuc/h.—S])ccific gravity, 2-G16. This is a fine- grained granite, and works freely; it has been employed in the construction of the Chapel of Ease in the town of Carlow. No. 7. Blackstairs.—Si^cciiic gravity, 2-622. A medium-