“…The results obtained do not im ply that changes of the trabecular pattern of the cancellous bone are a good indicator of the bone density. However, the future technical devel opm ent, e. g. the adoption of roentgen tubes equipped with very small focal spots for direct projection enlargem ents (Nixon [ 1956]), will probably increase the value of the method presented. Prelim in ary studies for its adoption to the clinical use are in progress.…”