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Nerve grafts from cadavers can be preserved for long periods, Dr. de Rezende found, in either liquid petrolatum or alcohol.

It is now certain that healthy persons may develop severe types of lipid pneumonia, especially if they use medicated liquid petrolatum intranasally in large quantities over long periods of time.

Lung-mapping by a roentgenogram taken promptly after the bronchoscopic insufflation of bismuth subnitrate powder or the injection of a suspension of bismuth in liquid petrolatum is advisable in most cases of pulmonary abscess before beginning any kind of treatment.

Liquid petrolatum with a little oil of eucalyptus has been most often the medium.

Fluid or liquid petrolatum is much used now in the form of a spray in the treatment of acute and chronic catarrh and after irritant applications to the nasal cavities.