290 



DISCOVERY 



as not merely handling lists of writing wrapped in 

 envelopes and pushing them through letter-boxes, but 

 will see that he is the agent in a complex process, by 

 which news of great importance is passing from human 

 being to human being across hundreds or even thou- 

 sands of miles — news, the collective value of which 

 will shape the world's destiny and his own as well. 

 These are rough and simple examples, but they suffice 

 to show that the deeper values we possess of the work 

 have now become our intuitions, and our soul will be 

 always in what we do. 



But, also, we are called away at times from our 

 work by the deepest mind within us. Ideals and 

 aspirations which we knoiv, but which we have not 

 as yet realised as a genuine part of our personality, 

 present themselves before the mind. The mind re- 

 flects upon these with " intellectual sympathy " and, 

 if this is continued long enough, the ideal begins to 

 burn within us. A complete transformation takes 

 place in life. The man now is the ideal realised. It 

 is at once clear that he is not the same kind of man 

 after such an experience as he was before it. The 

 teaching contains a religious significance which seems 

 akin to the deepest meaning of the Christian Gospels. 



The Nature of the Soul and Man's Future 



From what has already been stated it follows that 

 Bergson conceives of man as possessing in body and 

 mind two different qualities working in the closest 

 possible relation. His arguments that mind and 

 memory are other than cerebral movements and func- 

 tions are, in the writer's belief, imanswerable. In 

 some of his later writings man is shown, in the develop- 

 ment of his life, in some such manner as has been here 

 sketched, to be creating a life, within the reality of 

 time, and in the atmosphere oi freedom, which becomes 

 super-personal and which may survive the shock of 

 death. To get our young generation interested in 

 questions of this nature means the creation of new 

 beings and of a new world. 



BIBLIOGRAPHY 



In this list the most important works which liave been 

 translated into English are given : 



Time and Free Will. (Allen & Unwin.) 

 Matter and Memory. (Allen & Unwin.) 

 Creative Evolution. (Macmillan & Co.) 

 Introduction to Metaphysics. (Macmillan & Co.) 

 Laughter. (Macmillan & Co.) 

 Spiritual Energy. (Macmillan & Co.) 



Many volumes have been written in English on Bergson 's 

 philosophy. The following two volumes appear to the writer 

 of this article to be the most reliable ; 



A New Philosophy : Henri Bergson, by Edouard Le Roy. 



(Williams & Norgate.) 

 The Philosophy of Bergson, by A. D. Lindsay. (Dent &Sons.) 



Modem Industries — V 



Manufacturing Arsenic in Devon 

 and Cornwall 



By Edward Cahen, A.R.C.Sc, F.C.S. 



The chief impression that strikes a visitor on seeing an 

 arsenic works for the first time is the appearance of 

 dilapidation and primitiveness which it presents. 

 This is due in part to the surroundings, often the 

 remains of earlier industries, partly to the primitive 

 apparatus actually used and still found to be the best 

 for the purpose. Secondly, the visitor invariably 

 asks for what purpose all this arsenic is being manu- 

 factured, no doubt thinking of the minute quantities 

 he has read about in the accounts of some poison trial. 

 It is, in fact, rather startling to see this deadly white 

 powder heaped up in front of the chambers when they 

 are being cleared, or filling casks in the store. 



Devon and Cornwall have long been famous, not 

 only for their cream, but also for their white arsenic. 

 So pure, indeed, is the latter — manufactured, be it 

 remembered, by the ton — that it needs the utmost 

 ingenuity of the chemist to detect any difference 

 between it and the assay samples put up in small 

 bottles and sold in London with the guarantee and 

 analysis of such well-known firms as Kahlbaum and 

 Merck. 



Sources of Arsenic 



The chief source of arsenic is an arsenical pyrites, 

 a mineral of a silvery grey colour, locally known to 

 the miners as mundic, but scientifically called mis- 

 pickel. This is either mined specially for the purpose, 

 or obtained from the dumps of older workings such as 

 those of the copper and tin industries, where the 

 arsenic was left in the detritus after the metals had 

 been recovered. 



These dumps form quite a lucrative source of arsenic, 

 for the mundic, which is heavy, can easily be 

 separated from the lighter material by washing with 

 water. For this purpose a James table or similar 

 contrivance is used ; this consists of a large oblong 

 grooved table, slightly inclined, on to which the finely 

 crushed material to be washed is fed. Down one side 

 of the table there is a series of small jets of water 

 which wash the material down the table, which is 

 kept gently " jigging " the whole time. The heavier 

 mundic travels to the end of the table and falls off 

 into a receptacle, the lighter particles passing away to 

 one side. 



Arsenic Burning 



The mundic from either source is then taken to the 

 arsenic works proper and fed into furnaces. The type 



