390 



ITRIST, MACDONALD, MOSS, AND SKOOG 



Fig. IC. Snapshot showing the patient (Case No. 7) performing bicycling 

 exercises. Note the foreshortened trnnk, cine to collapsed vertebral bodies in 

 the spine. 



King Armstrong units; serum citric acid, 2.9 mg %; quantitative de- 

 terminations for fat in the stool were within normal limits; routine 

 urinalysis presented no abnormalities. 



Proline tolerance test. The rate of bone formation in Case 

 No. 7, as compared with normal growing children and an osteoporot- 

 ic patient with a fracture of the hip, was in\ estigated by means of 



