144 



ANNALS NEW YORK ACADEMY OF SCIENCES 



"Aphrodite." 



From T/angban, Sweden. Analysis by Delesse, with the formula: 

 MgO. SiOj. HgO. "A soft earthy mineral near sepiolite .... Perhaps 

 HgMg^ Si^. Oi5 but of doubtful homogeneity" (Dana). 



"Picrofluite." 



From Lupikko, Finland. Analysis by Galindo, with the formula: 

 4RO. SSiOj + 2CaF2 + SHjO. It has also been described as "a ser- 

 pentine intimately impregnated with fluorite" (Arppe), and as "probably 

 a mixture of fluorite with a magnesian silicate" (Dana). Neither the 

 formula nor these explanations account for the high percentage of magnesia 

 nor for the excess of lime (6.4 per cent) beyond that required in the possible 

 amount of fluorite. The deficiency in the total may be due only to in- 

 complete determination of fluorine. 



"Webskyite." 



From Amelose, Hesse. jNIean of two analyses by Websky, with formulas : 

 HeR^SiaOis + 6 aq. and H2(Mg, Fe) SiO, +^2 aq. 



