26 D. Mackintosh — Terraces on Inland Slopes. 



4. Instead of having examined no terraces, no not one, and found 

 rounded pebbles, etc., I have examined the composition of many, and 

 in the chapter of my work under notice I have stated that the Stock- 

 bridge terraces are covered vpith a reddish loam, mixed with whole 

 or fractured flints, and a considerable proportion of extra-rounded 

 flint pebbles. Yet I have not asserted the marine origin of these 

 terraces, though I believe (with the author of Frost and Fire) that 

 they are " sea- work. " I have likewise stated that one of the 

 Llangollen terraces, as revealed by a road-cutting, consists of " a 

 terrace of erosion covered by rounded stones, imbedded in clay and 

 earth." I may add that the Llangollen terraces are more or less 

 covered with an extension of the marine drift of North Wales. I 

 would not have mentioned the apparent refuse of decayed shells in 

 this drift, were it not that Mr. Darwin long ago believed that a 

 similar substance found in drift near Shrewsbury indicated the 

 former presence of sea-shells. 



5. Mr. Scrope is evidently not serious when he asserts that one of 

 the Llangollen terraces is close to the railway station, and presumes 

 that I examined it while the train was stopping. The terrace in 

 question is between a mile and a half and two miles from the nearest 

 station, namely, Llantysilio ; and I may be allowed to state that I 

 am not in the habit of pajang hasty or railway visits to geological 

 phenomena. 



6. The discovery of sea-shells in terraces is not an indispensable 

 proof of their marine origin, as undoubted marine drift, in which no 

 sea-shells have yet been met with, may be found extending over 

 whole counties. 



In conclusion, I would state that in the Geological Magazine, 

 nearly four years ago, I inadvertently used the word "raised beaches " 

 instead of raised coast-lines, tidal terraces, or current marks. In my 

 recent work I have not applied the term " raised beaches " to the 

 terraces of the chalk-downs, but have written about them in a very 

 cautious manner, merely expressing opinions, and leaving the ques- 

 tion of their origin in a great measure undecided. Neither have I, in 

 the above work, exclusively advocated " marine denudation," but 

 endeavoured to do justice to all parties. The power of fi^esh-water 

 streams, frost, and ice, I have fully acknowledged (see for instance 

 Becent Atmospheric Action in Snoiodonia), though I have regarded 

 them more as destroyers than originators of the more typical features 

 of the earth's surface. 



^isTOTiCES OIF nvcEnycoiias. 



Sir, — The kindness of Dr. Carl Jelinek, the Editor of the Austrian 

 Meteorological Society's Journal, has enabled me to place at j'^our 

 service the accompanying woodcuts, in illustration of the subjoined 

 translation, which you may, perhaps, think of sufficient interest to 

 find a place in the Geological Magazine. 



Robert H. Scott. 

 Meteorological Office, 116, Victoria-street, Westminster, S.W. 

 JJtcnnbn 8, 1 S69. 



