This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1874 edition. Excerpt: ...their elements. Berzelius long ago pointed ont that the different states of sulphide of mercury, iodide of mercury, &c., were probably to be attributed to a similar cause. Berthelot has advanced the opinion that the allotropic modifications of sulphur are intimately connected with, if not directly dependent upon, the electrical relation which this substance bears to the elements with which it is or has been united. When separated, by agents which are without action upon it, from those compounds in which it acts as an electro-positive body, as in sulphurous acid, it is amorphous and insoluble in bisulphide of carbon and other neutral solvents. On the contrary, when obtained from compounds in which it plays the part of an electro-negative element, as in sulphnretted hydrogen, it is susceptible of crystallization, and is soluble in bisulphide of carbon. Arc. Berthelot also states that the modifications of selenium exhibit a similar comportment, and has suggested that the different states of phosphorus may in like manner represent respectively electro-negative (ordinary phosphorus) and electro-positive (red phosphorus) conditions. It is worthy of remark that these views, which are of prime importance in their bearing upon the theory of substitutions, are almost identically the same with those concerning chlorine published some years since by Prof. Draper. Although the correctness of the observations of both these chemists has been called in question by other observers, it cannot as yet be admitted that their views have been disproved; they still deserve the most careful consideration. The apparent relation between some of the phenomena of allotropism and those exhibited by substances when in the so-called nascent state (a phrase used in...
- ISBN10 1234562006
- ISBN13 9781234562007
- Publish Date 1 October 2005
- Publish Status Out of Print
- Out of Print 4 October 2006
- Publish Country GB
- Imprint Chartered Institute of Personnel & Development
- Edition Large type / large print edition
- Pages 766
- Language English