ASB €=F cWaD=s G—H ABCDEF 
log N’/n (6,6) | +0,04 —0,18 —0,30 =6.15 —0,15 
EBDE 0,26 — 0,26 —0,39 —0,15 —0,30 
eee ek Ah ee Sy —0,41 kn 013 — 0,39 
for «=o; the figure shows that for e between 1 and 2 for these 
corrections the amounts 0,05 and 0.10 are to be adopted. 
From the limiting values thus obtained: 0,15 for m= 6,6, 0,35 
for m=8,1 and 0,49 for mn —= 9,4 the values of 9, can be directly 
deduced; we tind for it: o,=6,1; 5,5; 5,6.If we consider that 
differences of resp. 0,05 0,10 and 0,13 in these three limiting values 
mean a change in o, of 0.6, we may assume that the uncertainty 
of each of these values for @, remains below the unit. As the average 
we then find e, == 5,7 + 0,6, from which follows 
n— 0 ;0072 r = 140 parsecs 
where r probably lies between the limits 100 and 200 parsecs. The 
absorbing nebulae in Taurus therefore lie behind the Hyades at about 
a four times greater distance. They stretch on Dyson and Merorre’s 
chart over an extent of 30°, which is to say about 70 parsecs. The 
dimension of the oblong, strongly absorbing region A are about 9° 
by 3°, or 20 by 7 parsecs. BARNARD in his catalogue describes small 
black objects lying therein (and in the other region 4) of 1° (nr. 5 
and 18), 8’ (nr. 24) and 4’ (nr. 28) dimension; their linear dimens- 
ions are then 500000, 40000 and 30000 astronomical units. 
