236 Correspondence — A. J. Jukes- Broione. 



IV. MlNJiUALOGICAI, SOCIKTY. 



March 11, 1913. — Professor H. L. liowman, Vice-President, 

 in the Chair. 

 W. Campbell Smith : The Mineral Collection of Thomas Pennant 

 (1726-98). The collection, which has recently been presented to 

 the British Museum by the Earl of Denbigh, is accompanied by three 

 volumes of manuscript catalogue, written in 1757. The classification 

 used in them is based with some modifications on Woodward's iV«^««'rt/ 

 Hutory of the Fossils of England, published in 1729. Special mention 

 is made of specimens presented by Borlase, Pontoppidan, and Da Costa, 

 and the minerals from Flintshire were ti'eated in some detail. Several 

 specimens were described by Pennant in A Tour in Wales. — Arthur 

 Kussell : The Minerals and Mineral Localities of Montgomeryshire. 

 Of the species described the more remarkable are aurichalcite, from 

 Llanymynech Hill Mine, Llanymynech ; harmotome in double twins, 

 associated with barytes and witherite, from Cwm-orog Mine, 

 Llangynog ; hydrozincite, wliich forms a remarkable recent deposit 

 on the sides of a level in the Van Mine, Llanidloes ; pyromorphite 

 from Aberdeunant Mine, Llanidloes, and Llanerch-yr-aur Mine, 

 Llanbrynmair ; witherite from Cwm-orog Mine, Llangynog, Gorn 

 Mine, Pen-y-Gaer Mine, and Pen-y-Clyn Mine, Llanidloes, the 

 crystals from the last being noteworthy on account of the almost 

 entire suppression of the alternate faces of the pseudohexagonal 

 prisms and pyramids. — Dr. G. F. Herbert Smith : A new Stereo- 

 graphic Protractor. The novelty consists of a curved ruler, made up 

 of a combination of springs, which sensibly retains a circular curvature 

 within the limits for which it is required. At the centre of the arc it 

 is clamped to an arm, movable in a groove and carrying a scale, 

 from which the azimuth of the corresponding great circle may be 

 read off. The other edge of the protractor carries the usual tangent 

 scales, from which the position of the compass to draw any circle up 

 to the one corresponding to the great circle making an azimuth of 

 50° with the equatorial plane may be determined. The scales are 

 based upon a radius of 10 cm. — L. J. Spencer: A (sixth) List of new 

 Mineral Names. 



COE.E.ESFOIsriDE]3SrCE. 



THE AGE OF THE TOEBAY EAISED BEACHES. 



Sir, — If Mr. A. E,. Hunt desires to be an effective critic and not 

 a mere needless fault-finder, he should not base an argument on ancient 

 history and ignore modern research. He tliinks it "unfortunate" 

 that in dealing with the evidence of raised beaches in a recent })aper 

 on " The Making of Torbay " I made no reference to the " voluminous 

 literature " concerning them, and he writes as if he supposed there 

 had been no change of opinion aboiit them since the discussion which 

 took place at the Geological Society in 1890. 



Apparently he has not realized that the whole question of the age 

 of the raised beaches in Devon and Cornwall has entered an entirely 

 new phase since the discover}- that the raised beach of Gower (in 



