BIBLIOGRAPHY OF YORKSHIRE GEOLOGY. 
477 
1. — MAPS AND SECTIONS OF THE GEOLOGICAL 
SURVEY. 
On application to the Director General of the Ordnance 
Survey, Southampton, uncolonred copies of these maps, with 
the geological lines printed on, may be obtained for private use or 
for teaching purposes. 
There is no Drift Edition of some of the earlier maps, and 
in this case * Solid only ' is placed before the date. Where no 
solid map is published, the words 1 Drift only ' are used. The 
Old Series Maps (O.S.) of a higher number than 88 correspond 
with a New Series map, and the number of the latter is added 
in brackets, thus, [N.S. 59]. 
MAPS — Scale 1 inch to a Mile. 
Old Series — Hand-coloured. 
SHEET 
81 N.E.— Moors W. of Sheffield, by Prof. J. Phillips, 1852. 
Additions by A. H. Green, C. Le N. Foster, and J. R 
Dakyns. Solid only, 1866. 
82 N.W.— Sheffield, by Prof. J. Phillips and W. W. Smyth, 
1852. Additions by A. H. Green, J. R. Dakyns, and 
J. C. Ward, 1867. Additions by A. H. Green, J. R. 
Dakyns, J. C. Ward, R. Russell, and T. V. Holmes, 
Solid only. 1878. 
[82 X.E.— Tickhill, Harthill, by W. T. Ayeline, 1861. Addi- 
tions by A. H. Green and T. V. Holmes, 1875. Addi- 
tions by W. Gibson. Solid only, 1897. 
85— Spurn Head, by C. Reid. Drift only, 1883. 
86— Hull, South Cave, Howden, by J. R. Dakyns, C. Fox- 
Strangways, A. C. G. Cameron, W. A. E. Ussher, 
C. Reid, and A. J. Jukes Browne, Solid and Drift, 
1887. 
87 N.W. — Wakefield, Pontefract, Kippax, by W. T. Aveline, 
A. H. Green, R. Russell, and T. V. Holmes. Solid 
only, 1877. 
87 N.E. — Knottingley, Thorne, Snaith, by W. T. Aveline 
and T. McK. Hughes. Solid, some drift in eastern 
part, 1863. 
