Peculiar (8) ----------+-----------+--------- 185 | 12.3 | +0.48 205* | 9.3 | .90 524† | 11.9 | .41 3607† | 9.9 | .11 3998† | 12.1 | + .23 4459‡ | 11.3 | – .22 5485‡ | 12.3 | .05 5739 | 13.3 | –0.40 ----------+-----------+--------- The various types are homogeneously distributed over the sky, their spectra are similar, and the radial velocities are of the same general order. These facts, together with the equality of the mean magnitudes and the uniform frequency distribution of magnitudes, are consistent with the hypothesis that the distances and absolute luminosities as well are of the same order for the different types. This is an assumption of considerable importance, but unfortunately it cannot yet be subjected to positive and definite tests. None of the individual similarities necessarily implies the adopted interpretation, but the totality of them, together with the intimate series relations among the types, which will be discussed later, suggests it as the most reasonable working hypothesis, at least until inconsistencies should appear. TABLE II Barred Spirals ==========+===========+========= N.G.C. | m_{T} | log d ----------+-----------+--------- SBa (26) ----------+-----------+--------- 936 | 11.1 | +0.48 1023* | 10.2 | .78 2732 | 12.3 | .11 2781 | 12.3 | .11 2787 | 11.4 | .36 2859 | 11.1 | .28 2950 | 11.6 | .15 3384* | 10.7 | .48 3412* | 11.2 | + .40 3418 | 13.1 | .0 3458 | 12.8 | – .22 3945 | 11.5 | + .20 4026 | 11.1 | .48 4203 | 11.1 | .36 4346 | 12.0 | .20 4371 | 12.0 | .18 4421 | 12.8 | .17 4442 | 10.9 | .50 4477 | 10.9 | .40 4596 | 12.0 | .25 4643 | 11.1 | .26 4754 | 10.9 | .48 5473 | 12.0 | + .08 5574 | 13.0 | – .05 5689 | 12.0 | + .30 5701 | 12.3 | +0.17 +-----------+--------- Mean | 11.66 | +0.267 ----------+-----------+---------