Abstract From available observed data on 105 subdwarfs, it is found that their spectral types assigned are earlier by 6 or 7 subdivisions of a spectral type than those compatible with their effective temperature, their estimated space density is of order of 4 × 10–4 stars/pc3 or 2 × 10–4 M⊙/pc3 and their solar motion and the size of velocity ellipsoid are 10 and 5 times as large as, respectively, the usual values derived from nearby stars. On the other hand, statistics on these stars shows that their perigalactic distances concentrate in the region between 1. 5 kpc and 3. 0 kpc from the galactic centre, while the apogalactic distances disperse rather widely. Then, it is likely that these stars originated in the central bulge of the galaxy. If basing on a working hypothesis of an explosion of the galaxy, we assume that the highly elliptical orbits {e(mode)=0.6 ~ 0.7} of the subdwarfs have resulted from 40% massloss of the initial mass of the galactic nucleus by an explosion, the initial mean radius and eccentricity of the subdwarfs would have been āo=(3.0±2.0) kpc and ē0 = 0.55 ± 0.40 in the average respectively. Both mean errors correspond to 144 km/sec in the three-dimensional initial velocity dispersion. Finally, the turbulent velocity in the nucleus of the proto-galaxy is estimated to be of order of 300 km/sec under an assumption that the lag of the initial galactic rotation of these stars had been caused by the effect of the turbulent pressure.