44 



checked the movement of the ice somewhat during the ice-age, 

 so that the moraine approached slightly nearer the island; yet 

 the number of coarser ingredients in the sample is not so 

 great but that it might be explained in other ways, for example, 

 by icebergs. 



With respect to the finer particles, the curve very charac- 

 teristically shows two maxima, viz. a smaller one at about 

 Vs^i™, and a larger one in the ingredients under Vioo"^"^. It is 

 not easy to account for this circumstance. The mineralogical 

 constitution of the sandy ingredients plainly shows, as men- 

 tioned below, that they cannot have been derived in any quantity 

 from the Bontekoe 0, their presence may then possibly also 

 be connected with the proximity of the moraine; the original 

 rock thus consisted of pebbly sand, in which case all the finest 

 ingredients have been introduced later by the sea. There may 

 also have been a morainic rock here originally which had 

 an almost similar constitution to the now existing sample. If 

 this were the case only a very small amount of clayey ingre- 

 dients can have been conveyed hither since the ice-age, which 

 is hardly probable. 



The samples No. 17 — 19 are very regular, as will be seen 

 by the curves. This is especially the case with No. 17 and 19, 

 the composition of which is very much ahke. Hardly any ingre- 

 dients over 1/2"^™ are found, and very small quantities over 

 ^/20™"^, so that these two samples belong to the very finest 

 of those procured by the expedition. The curves are very regular 

 with the maximum at about ^ki^^. As the distance from shore is 

 comparatively great, the deposition cannot have taken place very 

 quickly. The lack of coarser ingredients plainly shows that 

 the ice must have had an exceedingly slight effect, and that 

 the moraine did not exercise the least influence here. The 

 curves also give us a good idea as to how sorted material 

 appears in graphic representation. The currents must in these 

 parts be very regular and permanent, so that just the size of 



