The Laws which regulate the Deposition of Lead Ore in Veins, illustrated by the Examination of the Geological Structure of the Mining Districts of Alston Moor. By W. Wallace. London: Edw. Stanford, 1861

1862 The Geologist  
I t is some time since we received the handsome book produced by Mr. Wallace on the mineral district of Alston Moor, and in the interim many periodicals have passed eulogiums on it, which it well deserves. The volume in our hands has not however been laid aside, but in truth it involved careful reading, and that involved time-an article not always plentifully at our disposal. I t has been thus only from time to time that we have fairly read and examined Mr. Wallace's labours, and our meed of
more » ... and our meed of praise, therefore; is not the less valuable from its being tardy. Even now other urgent demands upon our space restrict our notice to the shortest limits ; but at a season when mining and mineral products are displayed so prominently before the world, and men interested in commercial pursuits are congregated in London from all parts of the world, it is only right and just to bring this excellent literary production under their notice. The opportunity, therefore, is seasonable. W e are informed the book has already had a good sale, and we hope our remarks may cause an additional incoming to the exchequer of the author, who must have been at a considerable expense to have so profusely illustrated his work with the clearest and finest chromo-lithograph sections, plans, and maps. To collect, arrange, and harmonize the experience of many generations on any subject is indeed an arduous and difficult task, and it has been well remarked that it is peculiarly so with everything relating to metallic veins and metalliferous deposits. I n the first place, the information required is too often either wanting or defective, and the ideas of miners, commercial and scientific men all vary, in many degrees, according to the point of view from which the aspect is taken. Large profits may be derived from a poor mine when the price of metal is high, and rich mines may not pay when prices in the metal market are low. Large profits might accrue from leadore scattered in the sides of a soft vein, while a far greater amount of metal would not cover the expense of extraction from a hard one; and all these classes of circumstances naturally affect the views of those who are practically engaged in mining and tinge the opinions they offer. Fortunately for us, this debatable ground is not our territory. From the geological standpoint in the present case, we look to that more interesting topic, how the mineral veins were produced, how they exist in the strata of the earth's crust, and those other natural phenomena they present, which lead to a knowledge of their past history and their present conditions. Mr. Wallace begins his book at the right end. H e gives us first six chapters on the formation and geological structure of the mining districts of Alston Moor, in which he treats of the laws which have regulated the deposition of the mountain limestone in Great Britain, the elevation of the rocks of Alston Moor to the position they now occupy, and the laws which have regulated the denudation of the country, the laws of the formation and direction of veins, and the formation and direction of east and west veins, with descriptions of the principal; and then he enters into special details of the Alston Moor and Coal Cleugh cross veins, and the Quarter Point veins of Alston Moor. H e next gives us ten chapters on the laws w hich regulate metalliferous deposits, as illustrated by an examination of the lead veins or lodes of
doi:10.1017/s135946560000263x fatcat:4e2qrrnlkvfpbmjhzdzcwa3qxe