[Systematic study of the variations in mineral composition of different bones from various animals according to their localization].

X-ray diffraction techniques allow us to show that, in calcified tissues, phosphates resulting from a given formation process have the same ratio Ca/P for the bones at different subjects, providing these subjects are of the same kind and the same age. This ratio Ca/P depends on the bone formation process.

[Formation of the skeleton. VIII. Growth of a long bone: periostealization of the metaphysial bone].

The growth of the diaphysis of a long bone is manifested in three distinct constituent parts: the bone periosteal collar and, at both ends, the two metaphyses. These grow on the epiphyseal plate side and at the other end, they are integrated into the periosteal bone collar. This integration involves changes in the periosteal bone as well as in the fibro-cellular-layer which surrounds it.