fHOO Scientific Intelligence.— Mineralogy, 



19. Magnificent Crystals of Sulphate of Iron^ or Green Vi- 

 triol. — Although this mineral is not of rare occurrence, it sel- 

 dom appears regularly crystallized. Lately crystals, exceeding 

 in colour, transparency, size, and form, the finest specimens 

 produced by art, were found at Bodenmais in Bavaria, by M. 

 Moldenhauer, and noticed by Leonhardt. 



20. /serine and Iron-sand in Cheshire. — " I send you a 

 bag of mixed iserine and iron-sand, which I have, a few days ago, 

 traced quite across the Hundred of Wirral in Cheshire, from the 

 shores of the Mersey to those of the Dee. I found it many 

 years ago at Seacourse in that district, opposite to Liverpool, 

 loose on the beach, and disseminated through a bed of crumb- 

 ling sandstone, which lies below the thick bed of loam which 

 forms the Cheshire soil at that spot. I afterwards traced it a- 

 long the shores of the Mersey for several miles ; and lately, m 

 a short marine excursion to the islet of Kilberry, at the mouth 

 of the river Dee, I was pleased to recognise my old acquain- 

 tance, washed out of the sandstone rock which forms that 

 island, and the greatest part of the ridge of the Hundred of 

 Wirral. I conceive this stone to be the Millstone Grit of the 

 English geologists. Its upper bed is almost a farcilite, from 

 containing many nodules of quartz, and occasionally some of a 

 reddish felspar. It forms the ridge of Bidstone-hill and of 

 Wallesey. At HilbeiTy Isle it lies just under the scanty soil, 

 and rests on a much softer red sandstone, which appears to be 

 identical with that on which Liverpool stands, and which cuts 

 off the coal-measures in the coal-fields at St Helens and Prescot, 

 ten miles east of Liverpool, as well as that of Neston in Wirral, 

 on the shores of the Dee, opposite to Flint, and the portions of 

 that same basin on the Welsh shores of the Dee. Indeed, in 

 Liverpool the hard upper bed has been quarried as millstones, 

 while the under red or yellow sandstone, is much charged with 

 iron, and forms but an indifferent building material, which read- 

 ily corrodes, when exposed to the weather.''' — Letter from Dr 

 Traill^ Liverpool, to the Editor. 



21. Bismuth Cobalt Ore. External Characters. — Colour 



intermediate between lead-grey and steel-grey ; lustre metallic, 

 and gUstening or glimmering; texture radiated, partly stellu- 

 lar, partly parallel It scratches fluor-spar, but this degree of 



