Scientia Sinica

EXPLANATION OF PLATE II

Photomicrograph showing stages of the development of disintegrating tissues into young cells. The arrow head shows the direction of growth of the new epidermis; at the tip of growth there. is a swelling body surrounded by disintegrating tissues stained in dark blue and purple. A and B, aggregates; C, a newly formed young cell nucleus; D, a young: cell. .

Fixative: Susa, Staining: Mallory’s, Eyepiece: X 8, Objective: 100, Photo: Leica colour film, xX 5.7.

A, a larger, spherical young cell; B, a smaller spindle-shaped newly-formed young cell’ nucleus; C, cartilage. ;

Fixative: Susa, Staining: Mallory’s Eyepiece: 8, Objective: X 45, Photo: as above. Photomicrograph showing the disintegration of the connective tissue. The new epidermis grows under the scab from lower right to upper left. Along the course of growth there are disintegrating collageous fibres. A, the mixing of disintegrating collageous fibres and disintegrating leucocytes; B, newly-formed young cell nucleus.

Fixative, staining, magnification, and photo as above. .

Photomicrograph showing disintegration of the connective tissue. The new epidermis grows under the scab from lower right to upon left. Along the course of growth there are disintegrating fibres. A, Disintegrating collagenous fibres; B, the mixing of disintegrating collagenous and disintegrating leucocytes; C, newly-formed young cell nucleus; D, a newly-formed young cell nucleus resembling a lymphocyte; E, a young cell.

Fixative: Zenker-formalin, Staining: H. E. The rest as above.