The same observer traces to this acid change also an increase of appetite and digestive power, but an excessive dose deranges the stomach. Workmen exposed to the fumes of the gas suffer from acid dyspepsia and various symptoms traceable to gastric irritation; it is not likely that any blood-change should occur from continuous exposure to the dilute gas, but it is possible that some local solution of gastric epithelium may follow the constant contact of hydrochloric acid formed and swallowed in the buccal secretions.