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Contents 
and 2. Method of research. 
Catalogue of B-stars brighter than the 5!" magnitude with known radial velocity. 
Formule for computing R. 
Solution of the normal equations. 
Mean velocity of the B-stars, 
Computation of R from the proper motions of the stars of 8 3. 
Value of R computed from stars fainter than the 5!" magnitude with known radial 
velocity. 
Value of R computed from stars brighter than the 4** magnitude with known radial 
velocity. 
Values of R for stars of different subelasses (stars having known radial velocities). 
Values of R computed from all B-stars (N = 479) brighter than the sixth magnitude. 
Antapex. 
Law of density. , 
Coordinates of the centre from all stars (N — 751) in Pickerings catalogue (HA 56). 
Frequency distribution of the equatorial coordinates. 
Determination of the principal axes of the system of the B-stars. 
Direction of the principal axes. 
Galactic system of coordinates. 
Sphærical coordinates of some fundamental points in stellar statistics. 
Squares and constellations. 
The density function. 
Catalogues of Pickering. 
General Catalogue of stars of the spectral type B. 
Velocity of the B-stars. 
Frequency distribution of the velocities. 
Velocities along and perpendicular to the radius vector. 
