INI>KX 'l(> THK MTKKATllJK (»K TllDlMlM. 87 



180U: 716. Lkwes. Incandescent Mantles. 



J GasL., 1899, 73, 1194, 1195-1200; Annual Report of the Smitii- 



'sonian 'institution, 1900, ending June 30, 1900, 387-401; Am. Cias 



l.ight J., 1899, 70, 767-771; Sci. Anier. Suppl., 1899, 48, 19711- 



19712; Progressive Age, 1899, 17, 230-233; Rep. tecli. .jour.-lit., 



1899, 21, 47. 



1S99: 717. Note. Zur Frage der Atomgewichtseinheit. 



Ztschr. angew. Chem., 1899, 648-655. 

 1899 : 718. Judd and Hiddkn. On a new mode of occurrence of Ruby 

 in North Carolina, with Crystallographic Notes by J. H. Pratt. 

 Min Mag., 1899, 12, 139-149; A.n. .1. Sci., 1899, [4], 8, 370-381; 

 Bull. U. S. Geol. Survey, 1901, 172, 49; Jal.rb. Min., 1901, 93, 1, 

 187-189; Min. Mitth., 1901, 20, 266 Lit. Noli/.; Foitschr. Thys., 

 1899, 55', 270-271; Rep. tech. jour.-lit., 1899, 21, 177. 



1S99: 719. Harding. Thorium in Tennessee phosphates. 



Eng. and Min. .lour., 1899,67, 142; Chem. Ztg. Rep., 1899, 23, 69; 

 Wagner's Jsb., 1899, 30, 441 ; Jahrb. Min., 1900, 92, 2, 31. 



1899: 720. Note. Monazit. 



Berg. u. H. Ztg., 1899, 58, n. s. 53, 152. 

 1S99- 721. ExNKR and Haschek. tJber die ultravioletten Funken- 

 " spectra der Elemente. " Thorium," XV Mittheilung. 



Sitzungsber. Akad. <1. Wien. niath.-naturw. CI., 1899, 108, Abth Ua, 



825-859; Beibl. Ann. der Phys., 1899, 24, 109-110 Lit. Lebers; 



Fortschr Phvs , 1899, 55', 178-179; Science Abstracts, 1900, 3. 78-- 



783; Rep. tech. jour.-lit., 1899, 21, 718. 



1899: 722. Matthews, aassitication of the Carbides, their modes of 



formation, and reactions of decomposition. 



J. Am. Chem. Soc, 1899, 21, 647-650; J. Soc. Chem. Ind., 1899, 

 817-818; Chem. Centrbl., 1899, 70, 11,553. 



1899: 723. Bayerlein Atomgewichte der Elemente. 



Ztschr. anal. Chem., 1899, 138-140. 

 1899:724. Hillebrand. Mineralogical Notes. Analyses of Tysonite, 

 Bastniisite, Prosopite, Jetfersonite, Covellite, etc. 



Am. J. Sci., 1899, [4], 7, 51-57; Ztschr. anorgan. Chem. 1899. 20, 

 •'7:5- J Am. Chem. Soc, 1899, 21, in Review of Am. Chem. Re- 

 sea.'ch, 1899, 5, 38-:i9 ; Jahrb. Mm., 1899, 93, 1, 33-34 : Ztschr. 

 Krvst, 1901, 34, 95-97; Bull. soc. fran.;. min., 1899, 22 ..h-3< 

 F.uil. U. S. Geol. Survey, 1900, 172, 45; Chem. Centrbl., Ib.U, 

 70, I, 565-566; Rep. tech. jour.-lit., 1899, 21. :Jo6. 

 1899: 725. Rutherford, Coutts, Trotter, and McDonald. Uranium 

 radiation and the electrical conduction produced by it. 



Phil Ma<^ 1899 [5], 47, 109-163; Am. J. Sci., 1899. [4], 7,2;.s; 

 zlic^^ph^ikab chem'. unterricht.. 1899, 12, 298-299; Ztschr. 



