American journal of physiology . -. From the eighth of February to theend of the experiment on the first of March bread alone was fed,. FEB. lb 17 18 19 Figure 9. Second feeding experiment. Curve shows average activity of six pairs ofwhite rats. December 20th to 31st — dog-biscuit. January ist to 15th — bread. Janu-ary i6th to 25th — beef and bread. January 26th to 31st —bread. February ist to 7th— beef and bread. February 8th to March ist — bread. At points marked Februaryi8th and 19th the effect of lack of food is shown; at February 24th and 25th, theeffect of an escape of gas, and the same
American journal of physiology . -. From the eighth of February to theend of the experiment on the first of March bread alone was fed,. FEB. lb 17 18 19 Figure 9. Second feeding experiment. Curve shows average activity of six pairs ofwhite rats. December 20th to 31st — dog-biscuit. January ist to 15th — bread. Janu-ary i6th to 25th — beef and bread. January 26th to 31st —bread. February ist to 7th— beef and bread. February 8th to March ist — bread. At points marked Februaryi8th and 19th the effect of lack of food is shown; at February 24th and 25th, theeffect of an escape of gas, and the same at March ist. with a resulting rise in activity. The record for this last period re-mains uncomplicated, however, during only the first eight days. Onthe seventeenth of February the record for the preceding night wasnot noted, nor were the rats fed. The records for the sixteenth andseventeenth were therefore lost, while the records for the eighteenthand nineteenth show the effect of insufficient food. Recovery wascomplete by the twenty-third, when unfortunately gas escaped in theroom in which the experiments were carr
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