4 INDEX TO LITERATURE OF DIDYMIUM. 



Iridium. Bibliography of the metal, 1803-1885, by N. W. Perry, in 

 Mineral Resources of the United States, 1883-1884, p. 588 ; 

 School of Mines Quarterly, 1885, p. 114; Chem. News, 1885, 



5 1 ! P- 32- 



Manganese. Index to the literature of, 1596-1874, by H. C. Bolton, 

 Annals of the Lyceum of Natural History, New York, Vol. 

 II., Nov., 1875. 



Titanium. Index to the literature of, 1783-1876, by E. J. Hallock, 

 Annals of the New York Academy of Sciences, Vol. I., Nos. 

 2 and 3, 1877. 



Uranium. --Index to the literature of, by H. C. Bolton, 1789-1885, 

 Smithsonian Reports for 1885, Washington, 1885, p. 919- 

 946. 



Vanadium. Index to the literature of, 1801-1876, by G. Jewett Rock- 

 well, Annals of the New York Academy of Sciences, Vol. I., 

 No. 5, 1877. 



The general plan of the following index corresponds with that of the 

 others published. The indexes at the end of every volume of each 

 journal were consulted, unless an index covering a series of years was 

 available. The French journals proved to be very troublesome in this 

 respect, as indexes at the end of the volume are often omitted, and the 

 general indexes are seldom detailed enough to be of much value. 

 This was especially true of the Bull. Soc. Chim. and the Ann. Chim. 

 Phys. 



The abbreviations used are those given by H. Carrington Bolton 

 in his " Select Bibliography of Chemistry, 1492-1892," Smithsonian 

 Miscellaneous Collections, No. 840, Washington, 1893. 



