MINERALOGY. 



By EDWARD S. DA>'A, Ph.D., 



Yale College, New Haven, Connecticut. 



GENERAL MINERALOGICAL PROGRESS. 



The past year and those which have immediately preceded 

 it have been years of very important advance in mineralogy, 

 marked by a decided increase in the number of those inter- 

 ested in the science, and a corresponding increase in minera- 

 logical investigations. Until very recently there has been 

 but one mineralogical journal, and even in this the long- 

 known Jahrbuch filr Mineralogie the space was shared 

 with geology and palaeontology. In consequence of this 

 fact, the memoirs of the few active workers in this branch 

 of science were scattered through a large number of chem- 

 ical and physical journals and of society transactions. 



Now, however, there is the Zeitschrlfl filr Krystallographie 

 und Mineralogie, published by Professor Groth at Strasburg, 

 of which the second volume in nearly seven hundred pages is 

 completed this year. There are also the Mineralogische Mit- 

 theilungen, of Professor Tschermak, a journal which, for sever- 

 al years, was published at Vienna in connection with the Year- 

 book of the Austrian Geological Survey, but which this year 

 has commenced an independent existence in a new form with 

 an increased range of topics. There is also the Mineralogical 

 Magazine of Great Britain and Ireland, of which the second 

 volume is now being published. It is the organ of the British 

 Mineralogical Society. In addition to the above, the Crys- 

 tallological Society of London, founded in 1877, also publish 

 a series of Proceedings. Finally, there must be mentioned 

 the " Societe Mineralogique de France," which was organized 

 in March, 1878, and which, with Professor Des Cloizeaux, of 

 Paris, as the president, is showing a high degree of activity. 

 The meetings of the society are held about once a month, 

 and five of their Bulletins have already been issued. 



Each one of the above-mentioned journals gives, in addi- 



