274 

 7597 



7598 



7599 



7600 



7601 



7602 



7603 



7604 



7605 



7606 



7607 



7608 



7609 



7610 



7611 



7612 



7613 



7614 



7615 



7616 

 7617 



REPORTS ON THE STATE OF SCIENCE, ETC 

 (19) Garth Trevor, near Llangollen 



(20) Trevor Rocks, Garth, Llan- 

 gollen 



(21) Trevor Rocks, Garth, Llan- 

 gollen 



(22) Trevor Rocks, Garth, Llan- 

 gollen 



(24) Australia Pit, Trevor . 



(25) Australia Pit, Trevor . 



(26) Australia Pit, Trevor . 



(27) Near Whitehurst Halt and 

 Pen-y-Bont 



(28) Pen-y-Bont, terra-cotta brick 

 works 



(31) Horseshoe Pass, Llangollen . 



(33) Horseshoe Pass, Llangollen . 



(34) Horseshoe Pass, Llangollen . 



(36) Llangollen, Clogau Slate Qu., 

 near Pentre-dwfr. 



(37) Llangollen, Clogau Slate Qu., 

 near Pentre-dwfr. 



(38) Llangollen, Clogau Slate Qu., 

 near Pentre-dwfr. 



(39) Llangollen, Clogau Slate Qu., 

 near Pentre-dwfr. 



(40) Llangollen, Clogau Slate Qu., 

 near Pentre-dwfr. 



(46) Pandy, near Glyn Ceiriog 



(47) Glyn Ceiriog 



(49) Near Berwyn station . 



(44) Near Cefn Uchaf, Glyn Ceiriog 



Massive grit near top of sandy 1st. series 

 (Carb. Lst.). 



Carb. Lst. ; false-bedded sandy oolite 

 underlying massive bed. 1919. 



Carb. Lst. ; false-bedded sandy oolite 

 underlying massive bed. 1919. 



Qu. in sandy limestone of Carb. Lst. 

 series. 1919. 



Lowest Coal Measures quarried for fire- 

 clay and Gannister. 1919. 



Lowest Coal Measures quarried for fire- 

 clay and Gannister. 1919. 



Aqueduct Grit, Cefn-y-fedw sandstone. 

 1919. 



Dee Valley where river enters post- 

 glacial gorge. 1919. 



Etruria or Ruabon marls (Up. Coal 

 Measures) capped on left by Glacial 

 Drift. 1919. 



Old workings in Pentre-dwfr slates on 

 right. 1919. 



Quarries in Pentre-dwfr slates in fore- 

 ground. 1919. 



Carb. Lst. escarpment in distance, 

 Silurian hills midway. 1919. 



Highly cleaved and inclined L. Ludlow 

 slates. 1919. 



Highly cleaved and inclined L. Ludlow 

 slates. 1919. 



Highly inclined and cleaved L. Ludlow 

 slates. 1919. 



Bedding and jointing in slates. 1919. 



Slates breaking up along bedding planes 

 under influence of weathering. 1919. 



Cleaved coarse Pandy ash (Caradocian). 

 1919. 



Old Qu. in Pen-y-glog slates (base of 

 Wenlock). 1919. 



Highly inclined L. Ludlow beds. 1919. 



Qu. in L. Ludlow shale. 1919. 



Merioneth. — Photographed by G. M. Davies, M.Sc, 104 Avondale Road, 



South Croydon. 1/4. 



7618 (15-16) Aberdovey, looking W. The ' Roman Road.' 1915. 



down the Dyfi estuary 



7619 (15-15) Aberdovey, looking E. up The ' Roman Road.' 1915. 



the Dyfi estuary 



Photographed by G. G. Lewis, Ellerslie Road School, London, W. 12. 1/4. 



7620 (11) Mawddach Estuary . . Bar or spit across river mouth. 



Channel Isles. 

 Alderney. — Photographed by the late T. W. Reader, and presented by 



F. W. Reader. 1/4. 



7621 The Casquets, W. of Alderney . These rocks are composed of grits. 1921. 



7622 The Casquets, W. of Alderney . These rocks are composed of grits. 1921. 



Guernsey. — Photographed by H. W. Turner, M.A., The University, 



Bristol P.C. 



7623 (1-8-4) Grand Camp (N. shore of Acid veins in diorite. 1922. 



island) 



