The second, adelite, occurs at Laugban and at Nord 

 gray color, with a hardness of 5 and a density of ! 

 leads to the formula 2CaO, 2MgO, H 2 0, As 2 0,- Tli 

 probably an apatite. It is found in colorless he 

 Harstig Mine, Pajsberg. a : c = 1 : .714:5. Com 

 lOCaO. 3As 2 5 . 



The Sargasso Sea.— In a recent number of PetermannV ' Mitteil- 

 ungen ' Dr. O. Krummel states the result of his investigations into 

 this interesting marine problem. In the first place, he differs entirely 

 from Humboldt as to the shape of the floating mass of vegetation. 

 The " great bank of Flores and Corvo" is, he says Humboldt', sum- 

 ming up of the observations made by sailing-vessels passing through 

 the Sargasso Sea on their way from the Southern hemisphere to 

 Europe. These followed with slight variations the same course, and 

 their observations were naturally limited in extent. It was on these 

 insufficient data that Humboldt founded his theories as to the size and 



shape of the Sargasso J 



■ the aid of s 



ns on these points. On a map which 

 he has prepared Dr. Krummel has plotted out the general contour of 

 the mass of floating vegetation, and has indicated in what part, ot tla- 

 sea the sargasso is found in the greatest abundance. In shape the >ar- 

 gasso Sea is a sort of ellipse, the great axis of which aim - 

 with the Tropic of Cancer, while the two foci are near long. 4o° and 70 

 West. Around this central ellipse others are indicated, larger in -i/, •. 

 but with the vegetation much less dense. In their general outline they 

 follow with sufficient nearness the course of the prevailing wind* Aa 

 to the origin of the alga,, Dr. Krummel is strongly of the opinion that 

 they come from the land-m.t only from the Gulf ,f Mexico and the 

 coast of Florida, but from the shores of the Antilles and the Bahamas. 

 The most recent studies with regard to the origin and course of the 

 (nilfStream tend, he think, strongly to support those who assert J 

 the alga? come from the land, and to disprove the i 





