134 Butler and Schaller — Thaumasite. 



Comparison of analyses of thaumasite. 



Jemtland, New Jersey. Utah. Theory. 

 Sweden. 



SiO, 9-70 9-26 10-14 9-64 



S0 3 " ... 13-02 13-44 12-60 12-86 



C0 2 6-86 6-82 6-98 7-08 



Cad 27-2S 2M3 26-81 27-01 



ll 2 C) 42-20 42-77 42-97 43-41 



(Al,Fe)„O s .. -16 o-20 



MgO - 0-23 



Na 2 -11 0-39 ) 



K.,0 -08 0-18 j tr - 



P 2 "0 5 .... tr. 



CI -12 



99-53 9999 99"93 100-00 



The new locality in Utah makes the third general locality 

 in which this mineral has been found, or the fifth distinct mine, 

 the three localities in Sweden being fairly close together. 



Bibliography. 



Backstrom, H. Geol. For. Fork, vol. xix, p. 307, 1897. 

 Bertrand, E. Bull. soc. mineral., vol. iii, p. 159, 1880. Ibid., vol. 



iv, p. 8, 1881. Ibid., vol. xix, p. 88, 1896. Geol. For. 



Forh., vol. ix, p. 131, 1887. 

 Cohen, E. Jahrb. Mineral., vol. ii, p. 22, 1881. 

 Lacroix, A. Geol. For. Forh., vol. ix, p. 35, 1887. 

 Levy, A. M. and Lacroix, A. Mineral, des Roches, p. 286, 1888. 

 Lindstrom, G. Oefv. Ak. Stockholm, vol. xxxv (No. 9), p. 43, 



1878. 

 Nordenskiold, A. E. Comptes rendus, vol. lxxxvii, p. 313, 1878. 



Geol. For. Forh., vol. v, p. 270, 1880. Ibid., vol. viii, 



p. 146, 1886. 

 Penfield, S. L. and Pratt, J. H. This Journal (4), vol. i, p.229, 



1896. 

 Pisani, F. Bull. soc. mineral., vol. xix, p. 85, 1896. 

 Widman, O. Geol. For. Forh., vol. xii, p. 20, 1890. 

 Zambonini, F. Mem. Ace. Sci. Napoli, vol. xiv, p. 11, 1908. 



U. S. Geological Survey, Washington, D. C. 



