NINE PLATES (FOURTEEN FIGURES)
THE OBJECTThe object of paper is the presentation of evidence which supports the ,ollr)wiiig findings, namely :1. That, under the adequate mechanical conditions produced by an intact, normally mobile knee-joint and its related soft parts, patellar cartilage and bone will regenerate from young connective-tissue cells which had not been destined as specific formers of bone.2. That, where the adequate mechanical conditions are altered by means of immobilizing the knee-joint, with the patella left intact, patellar cartilage and bone will atrophy.3. That, mhere the patella is excised in toto and the adequate mechanical conditions are altered by means of kneejoint fixation, patellar cartilage and bone will not regenerate, even with the tendon of the quadriceps extensor femoris muscle and the patellar ligament united by suture.
tion at 1 P.M. the next day, one dosis nf'cctarts of atabrine having been given at midnight between the 2 examinations. Twenty-two birds survived long enough to be included in tlie record of this investigation : controls were injected with water alone.
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Microincineration of Active Smooth, Transitional and SkeletalMuscles." * These investigations iwrc carried out with the aid of a grant for Research to tlir Departmmt of h a t o m y , Marquette Vnivrrsity School of Medicine, by the ('ommittee on Sc4entific. Research of the -4nierican Medical Association.
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