238 
Proceedings of the Royal Society of Edinburgh. [Sess. 
that the apex of this stream is about 90° from the centres of the two 
regions. The diminution in C and D is in general agreement, except that 
the smallness of the case of D would indicate that the apex of the stream 
is somewhat nearer the centre of the region, say at R.A. 6 h 30 m , instead 
of R.A. 6 h 15 m . 
The small maximum for Stream II in region A is in accordance with 
the position of the apex at a distance of 16° from it. For the other regions 
whose centres are 75°, 90°, and 75° from this point, the maxima should be 
approximately equal. 
These results strongly support Professor Kapteyn’s hypothesis that the 
stars are moving in two streams. The quick-moving stars here considered 
show the streams in a very pronounced manner. This is particularly the 
case with Stream II. 
The positions found for the apices may be compared with those found 
by Kapteyn and Eddington : — 
Kapteyn 
Eddington . 
Present research . 
Stream I. 
R.A. 85° Dec. -11° 
„ 90° „ -19° 
„ 94 ' - r 
Stream II. 
R.A. 260° Dec. - 48°. 
„ 292° „ -58°. 
« 240° „ -74°. 
For Stream I the three determinations agree within 7° of the point R.A. 
90°, dec. —12°, and for Stream II within 14° of the point R.A. 263°, 
dec. -60°. 
{Issued separately April 9, 1908.) 
