One year previous his weight was 105 pounds, but when last seen he weighed 284 pounds and was increasing a half pound daily.

Despite his continuous eating, this boy constantly complained of hunger.
Polydipsia is an abnormal thirst; it may be seen in persons otherwise normal, or it may be associated with diseases--such as diabetes mellitus or diabetes insipidus.

Mackenzie quotes a case from Trousseau, in which an individual afflicted with diabetes insipidus passed 32 liters of urine daily and drank enormous quantities of water.

This patient subjected himself to severe regimen for eight months,--although one day, in his agonies, he seized the chamber-pot and drank its contents at once.

Mackenzie also mentions an infant of three who had polydipsia from birth and drank daily nearly two pailfuls of water.