From the net calories required for maintenance at the lower weight level, we inferred that the caloric requirement had been reduced very considerably, i. e., from a net intake of not far from 3,100 or even more calories to a net intake of 1,950 calories during the period of maintenance at the low weight level. This involved not only the basal metabolism, but likewise the metabolism necessary for the general activity for the day. From the results of the metabolism experiments we find that this estimated loss in caloric requirement as based upon the caloric intake, using body-weight maintenance as an index, is reasonably substantiated. During the period of diet restriction, we find a lowering of body-weight amounting on the whole to not far from 10 to 11 per cent. We also find in periods of complete muscular repose, without extraneous muscular activity, there was a lowering of the heat production per kilogram of body-weight of not far from 20 per cent as computed from the group-chamber tests, making a total effect of caloric saving or a lowering of the total caloric maintenance of not far from 30 or more per cent. The differences found between the basal values in the group chamber (see table 132) and the values obtained with the respiration apparatus vitiate somewhat this generalization, and caution is necessary in these quantitative estimates.