During the past 15-20 years our knowledge concerning
the phosphorus content of the blood has been considerably
advanced by the work of several investigators.
The inorganic phosphorus fraction, which is only about
tylQ of the total phosphorus compounds of the whole
blood, appears to have claimed the attention of most of
the previous workers, and, therefore, abundant data are
available from the literature both for health and disease.
Because of this, the inorganic phosphorus fraction of
the blood has already acquired some definitely practical
The other fractions of the phosphorus of the blood
have attracted the attention of fewer workers, and have
been less studied with the obvious result that such scanty
observations as are available, are still of only theoretical
interest and no clinical value.
In view of this scanty information as to the total
content and the distribution of the phosphorus compounds
in the blood it seemed advisable further to investigate
the question and the present communication is an attempt
to do this using the child chiefly as the material.