Mercurius Sulphuricus merc-sul.

Hydrargyrum oxydatum sub-sulphuricum. Yellow precipitate. Turpeth mineral. HgSO 4 2 HgO. [There is not a little confusion about the identity of this drug in the books. Turpeth is correctly given by Allen as HgSO 4 2 HgO. Hering, who proved and introduced it, calls it Turpethum and Turpeth mineral , but gives the formula HgSO 4 . The Pharmacopæia of the American Institute of Homœopathy describes the white sulphate, HgSO 4 , under the heading Mercurius sulphuricus, but says it is "mentioned in Allen's Encyclopædia ," Vol. vi., p. 325; whereas it is Turpeth , the yellow precipitate, which is there spoken of.] Trituration.

Dropsy. Dysuria. Hydrothorax.

Lippe is the chief clinical authority for this medicine. He considers it as important as Ars . in dropsies of the chest. The symptoms on which it has been prescribed are clinical, and have been well confirmed. Among them is this: "Pain in right chest extending to scapula; he can scarcely breathe; < 4 to 5 p.m." When Merc. sul . acts well, says Lippe, "it produces a profuse watery diarrhœa with great relief to the patient." It is particularly suited to hydrothorax depending on liver or heart affections. Other confirmed symptoms are: Soreness of tip of tongue. Œdema of legs. Scanty and scalding urine, but clear. Among the Conditions of Merc. sul . the most peculiar is: < In afternoon; 4-5 p.m. > By profuse diarrhœa (dyspnœa). After diarrhœic stools there is numbness of legs.

Compare: Cinnabar., Æthiops antimonialis, and other Mercuries. Also in hydrothorax, Ars. < Afternoon, Lyc. Dropsy, Dig.

Low-spirited; with chilliness and yawning. ─ Ill-humour after eating.

Sensation of giddiness while standing, after headache. ─ Fulness in head with occasional stitches. ─ Soreness and heaviness through head (after breakfast and when walking about.). ─ Violent itching of hairy scalp throughout the proving.

Oppression over eyes. ─ Eyes < from sunlight.

Burning in ears and in face, after a chill.

Sneezing; in sunshine; with fluent coryza. ─ Swelling and soreness of tip of nose. ─ Itching of nose.

Pale, anxious countenance. ─ Swelling of parotid gland.

Gums and palate dark bluish (black), ulcerated margins. ─ Mouth clammy, and full of mucus in morning. ─ Burning, smarting, stinging pain on tip of tongue (l. side, in evening). ─ Tongue: Greenish yellow down middle; coated white heavily; yellowish at root; the enlarged papillæ stand up like red points, with flat taste in mouth and a reduced pulse. ─ Lips, gums, fauces, mouth, and tongue swollen; look dry and black. ─ Salivation.

Heat and sensation of constriction in throat. ─ Dryness of tongue and throat. ─ Burning in mouth and throat.

Violent yellow vomiting. ─ Stomach so irritated nothing would stay on it an instant. ─ Pain; weight in stomach; tenderness. ─ Vomiting and diarrhœa.

Coldness or burning in abdomen. ─ Woke 1 a.m. with severe pains along duodenum to umbilical region. ─ Soreness in inguinal glands.

After drinking coffee, pain in abdomen as if diarrhœa would set in. ─ Stools soft and earlier in morning than usual. ─ Sudden and violent pressing to stool while walking compelling him to stand still, causing an anxious perspiration; later the stools are forcibly gushing out in a hot, burning stream of yellow water; followed by great debility, hiccough and belching. ─ After the diarrhœic stools sensation of fulness as from congestion to legs, esp. feet, they feel numb when standing. ─ Violent purging; rice-water motions, some yellow.

Diminished secretion of urine, does not micturate frequently, but has constant pressure; urine dark, becoming turbid with a scum on it. ─ Increased secretion of urine, without a sediment. ─ Urine scanty and scalding, but clear.

Gonorrhœa and syphilitic diseases, with great congestions to the parts. ─ Swelling of testicles. ─ Involuntary emission and lascivious dreams.

Roughness in throat and hoarseness. ─ Sensation of heat in larynx. ─ Increased expectoration of mucus from larynx" and trachea.

Burning in chest. ─ Pain in chest prevents him from breathing. ─ Pain in r, side of chest, extending to scapula, can scarcely breathe, < from 4 to 5 p.m. ─ Pressure on chest. ─ Dyspnœa; in children; hydrothorax.

Numbness in l. forearm and hand, later numbness in r. hand. ─ Hands icy cold with blue nails. ─ Stiffness in arms.

Pain in knees and lameness, esp. when walking. ─ Foot-sweat with soreness at ends of the nails. ─ Ulcers on ankles.

Most pains feel as if a dull stick pressed on the parts and were moving in diverse curved lines; feels as if this pain were in the bones. ─ Debility with sleepiness. ─ Rheumatic pains.

Induration of the glands. ─ Psoriasis: lepra.

Frequent yawning and great sleepiness in afternoon. ─ Sleeplessness after midnight. ─ Awakens with headache in morning.

Chilliness running up back, with yawning and depression of spirits, followed by dull pain in forehead, burning in face and ears and slight fever. ─ Chilliness, restlessness, and heaviness in upper part of abdomen, frequent yawning and diminished secretion of urine (afternoon).