TXDKX TO TTTE LITErtATTTlE OF Tlli)|;rr^r. 100 



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1901 : 926. Kraus and Rkitingkr. Hussakit, ein neues mineral und 

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Ztsclir. Kryst., 1901, 34, 2GS-277 ; J. Am. Chem. Soc, 1902, 24, in 

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1901 : 927. Pegram. Radio-active minerals. 



Science, 1901, 13, 274 ; Berg. u. H. Ztg., 1901, 60, n. s. 55, 220 ; Pro- 

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1901 : 928. Hempel. Ueber Messung hoher Temperaturen mittels des 

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Sachsisch-Thiiringischeii Bezirksverein des Vereins Deutscher Chera- 

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1901:929. Herzfeld and Korn. Chemie der seltenen Erden. Berlin, 

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1901: 931. Guillaume. Les lois du rayonnement et la theorie des 

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1901: 932. Pegram. Radio-active substances and their radiations. 



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