XXXIV PROCEEDINGS OF THE GEOLOGICAL SOCIETT. 



rected to Geology, a science then in its infancy, he brought his 

 knowledge of chemistry to bear npon the many difficult and inter- 

 esting problems of Chemical Geology. In 1826 he published a 

 paper " Sur rorigine des sources Minerales." In 1827 a paper 

 " Sur les efflorescences des Eoches Volcaniques." These were followed 

 by various papers on Fossil bones, the inflammable gases of Coal- 

 mines, Volcanic rocks, Glacier action, and others in the 'ISTeues Jahr- 

 buch.' Many of his papers appeared in the ' Edinburgh New Philo- 

 sophical Journal ; ' amongst them are to be found " On the Natural 

 History of Volcanoes and Earthquakes," " On the Terrestrial ar- 

 rangements connected with the appearance of Man on the Earth," 

 " On the cause of the Temperature of Hot and Thermal Springs, and 

 on the bearings of this subject as connected with the general ques- 

 tion regarding the internal temperature of the Earth," He also 

 treated of " The Glaciers in their relation to the elevation of the 

 Alps," and of " The Formation of Quartz and Metallic Veins." 



Most of his early papers were afterwards embodied in his great 

 work the ' Lehrbuch der chemischen und physikalischen Geologic,' 

 which appeared between 1847 and 1854. In the latter year a trans- 

 lation of this work by Dr. Paul and Dr. Drummond, made under the 

 supervision of the author, was published by the Cavendish Society. 

 This important work, more condensed than the German edition, is 

 in some respects an independent work. In the first volume, the 

 laws of combination of the mineral kingdom, pseudomorphic minerals, 

 the action of water as a chemical and a transporting agent, the 

 origin of springs, the action of rivers and of the sea, the mechanical 

 and chemical deposits from water, and the character and origin of 

 carbonaceous substances, of various gases, and of the simple salts 

 occurring in the mineral kingdom, are treated of; while in the 

 second the chemical reactions relating to the alteration of minerals, and 

 the characters of and changes inFelspathic and various other minerals, 

 especially those of volcanic and igneous origin, are considered. No 

 geological studies can be complete without a knowledge, at all events, 

 of the elements of Chemical Geology, In 1861, Professor BisehoiF 

 was elected a for'eign Fellow of this Society ; and in 1863 the "VVoUas- 

 ton Medal was awarded to him by the Council, in recognition of the 

 eminent services rendered by him to Geological science by his long- 

 continued and laborious chemical investigations on the origin and 

 changes of minerals and rock- substances, and especially by the pro- 

 duction of his great work on Physical and Chemical Geology. 



