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British Association for the Advancement of Science. 127 
Dr. Buckland announced that the Fossil Flora of Great 
Britain was about to be continued by Messrs. Hutton and Hens- 
low.—Dr. Lloyd mentioned the recent discovery of Saurian re- 
mains in Warwickshire—Dr. Ward exhibited specimens and 
drawings illustrative of impressions of the feet of animals on the 
Greensill sandstone, near Shrewsbury. Greensill hill consists of 
a steep escarpment of new red sandstone, and contains four strata 
that have been described by Mr. Murchison, and in the second of 
which the impressions were found. This stratum when expesed 
to the atmosphere, always splits soas to exhibit ripple marks, and 
on these marks the impressions of feet have been observed, as well 
_ asmarks of drops of rain. 'The latter are often in an oblique direc- 
tion, as if having fallen in a gale of wind, the direction of which ~ 
is thus pointed out. The foot-marks differ from those of the 
_ Cheirotherium, in having only three toes, armed with long nails, 
directed forwards, and not spread out. Nothing resembling the 
ball of the foot has been observed, except in a few, which have 
~ Some resemblance to the impression of the foot of a dog. 
Mr. Knipe read a communication on a trap dyke in Cumberland. 
Its length is 22 miles and its width from 20 to 30 yards. Its 
course coincides with that of the great Cleveland Dyke, and it is 
not improbable that they may be connected ; if so, a basaltic dyke, 
120 miles long, crosses our island from the Solway Firth to the ~ 
_ German Ocean. = 
Mr. Darwin announced that a work on fossil teeth by Prof. 
_ Owen; will shortly be published. 
~ Acommunication on Peat-bogs, by Dr. G. H. Adams, was 
‘read. The author had examined microscopically many speci- 
mens of peat, and had found them to consist of bundles of little 
capsules, somewhat like bunches of raisins, attached to the radi- 
cles of the plants growing on the surface of the bogs.—Mr. J. B. 
Yates read a paper on the Changes and improvements in the 
embouchure of the Mersey.—A paper was received from Mr. R. 
Gamer on the use of millstone grit in the manufacture of white 
earthen-ware. Millstone grit has been used in Staffordshire for 
* = - * “s : 
‘ three or four years, being ground instead of flint, which is more 
expensive, as it must be calcined before grinding. The ware 
+ thus produced is as white, compact and durable, as that made by 
former process. 
