132 REPORTS ON THE STATE OF SCIENCE.—1912. 
Erratic Blocks of the British Isles.—Report of the Committec, 
consisting of Mr. R. H. Tropeman (Chairman), Dr. A. R. 
DwerryHouse (Secretary), Dr, T. G. Bonney, Mr. F. W. 
Harmer, Rev. S. N. Harrison, Dr. J. Horne, Mr. W. 
Lower Carter, Professor. W. J. Soutas, and Messrs. WM. 
Hint, J. W. SratHer, and J. H. MiLron. 
ENGLAND. 
Reported by the Northumberland and Durham Boulders Committee of 
the University of Durham Philosophical Society. 
1. Reported by G. Weyman, B.Sc.— 
(a) Boulder clay, Kenton Quarries: Greywacke (3); porphyrite, 
Cheviots (2); Cheviot granite; grey granite; Crystalline limestone ; 
quartz porphyry. 
(b) Gravel deposit, Horsebridge Head, Newbiggin: Flints (2); 
quartzite: schist (2); quartz porphyry; granite (3); Cheviot granite ; 
syenite (4); mica porphyrite ; chert ; andesite ; breccia, 
(c) Boulder clay, Tynemouth: Greywacke; granite (2); syenite; 
porphyrite ; micro granite. 
(d) Blue clay, Tynemouth: Voleanic series of Borrowdale ; granite. 
(ec) Vicarage Burn, Barrington: Granite. 
2. Reported by F. Waker, B.Sc.— 
(a) Boulder clay, Armstrong Park, Heaton: Cheviot granite. 
(b) Standard Brick Works, Heaton: Basalt; dolerite; quartzite ; 
calcareous grit. 
(c) Boulder clay, Monkseaton: Granite; syenite; basalt; volcanic 
series of Borrowdale. 
(d) Corbridge: Volcanic series of Borrowdale and granite. 
3. Reported by Dr. Woouacorr.—Aycliffe Quarries. Resting on 
the limestone here is a blue stony clay, with sand, leafy clay, and yellow 
clay above. The surface is striated 30° W. of S: In the stony clay 
boulders of Threlkeld granite and volcanic series of Borrowdale occur. 
4. Reported by F. Watxer, G. Weyman, and Dr. Woouacorr.— 
From Armstrong Whitworth’s New Shipyard, Walker-on-Tyne: 
Granite (Criffel); several other granites; syenite; volcanic series of 
Borrowdale ; whin; Carboniferous limestone (several) ; Magnesian lime- 
stone ; brockram ; sandstone ; conglomerate (Tuedian ?). 
5. Reported by Dr. Smytue.—Striations observed on Whin Sill 300. 
yards east of Northside, Kirkwhelpington. Height 700 feet. Direc- 
tion E. 
Reported by the Rev. A. Irvine, D.Sc., and Mr. Percy A. Irvixa, 
B.A.— 
‘ Erratics found in the Boulder Clay at Harlow (Essex).”! 
The following geological formations are represented :— 
1. Carboniferous Limestone.—Numerous blocks of various shapes 
(one block nearly a cubic foot), Examples: (a) Striated block 
1 See Nature, June 20, 1912. 
