Oxalicum Acidum. Oxalic Acid. Hydrogen Oxalate. C2H2O42H2O. Trituration. Tincture.   Clinical.-Angina pectoris. Back, pain in. Chest, affections of. Cholera infantum. Convulsions. Deltoid rheumatism. Enuresis. Eyes, affections of. Gastrodynia. Gout. Gravel.

Ovi Gallinae Pellicula. Membrane of the Shell of a Hen’s Egg. The fresh membrane is triturated in 0.95 alcohol, allowed to digest several days, and then potentised (Swan).   Clinical.-Amenorrhoea.

Ostrya. Ostrya virginica. Hop-hornbeam. Iron-wood. Lever-wood. N. O. Cupuliferae. (Corylaceae.) Tincture of heart wood.   Clinical.-Headache, dull. Head, numb. Intermittent fever. Liver, affections of. Lumbago. Malaria. Malarial anaemia.   Characteristics.-The

Osmium. OSMIUM. The Element. Os. (A. W. 190.3). Trituration of the precipitated metal.   OSMICUM ACIDUM. Osmium tetroxide. OsO4. Dilutions with absolutely pure water.   Clinical.-Asthma. Bronchitis. Cold, liability to.

Ornithogalum. Ornithogalum umbellatum. Star of Bethlehem. [A plant of which there are many varieties; nearly allied to Garlic (Allium Sativum)]. N. O. Liliaceae. Tincture of fresh plant.   Clinical.-Cancer. Flatulence.

Origanum. Origanum marjorana. Sweet Marjoram. N. O. Labiatae. Tincture of whole fresh plant.   Clinical.-Breasts, affections of. Erotomania. Hysteria. Leucorrhoea. Nipples, irritation of. Nymphomania. Seminal emissions. Sexual irritation.   Characteristics.-The

Oreodaphne. Oreodaphne Californica. Mountain Laurel. Spice-Bush. Balm of Heaven. N. O. Lauraceae. Tincture of the leaves.   Clinical.-Headache, fronto-occipital; occipital.   Characteristics.-Oreodaphne Cal. is a tree which grows to a