There was apparently no polydipsia during the daytime.
The amount of water drunk by glass-blowers in a day is almost incredible.

McElroy has made observations in the glass-factories in his neighborhood, and estimates that in the nine working hours of each day a glass-blower drinks from 50 to 60 pints of water.

In addition to this many are addicted to the use of beer and spirits after working hours and at lunch-time.

The excreta and urine never seem to be perceptibly increased.

When not working these men do not drink more than three or four pints of water.