Bromine
a non-metallic element.
Symbol Br; atomic weight, 79.4. Bromine was discovered in 1826 by Balard, in the salts obtained by the evaporation of sea water. Bromine is liberated from the sodium and magnesium salts by the action of free chlorine, and is separated by ether, which dissolves the bromine.
This red-colored solution is removed, saturated with potash, evaporated, and heated to redness, and the bromide of potassium is heated with manganese dioxide and sulphuric acid. The bromine is liberated in the form of a deep reddish black liquid. Specific gravity red vapor, which condenses into a dark , 2.97, it boils at 63°; its vapor density is 5.54' times that of air. It has an irritating smell, and when inhaled is poisonous. It dissolves in 30 parts of water, and the solution has weak bleaching properties. Bromine and hydrogen do not unite in the sunlight, but do when they are passed through a red hot porcelain tube, forming hydrobromic acid (HBr), which is also obtained by the action of phosphorus and water on bromine. It is a colorless, fuming gas, which liquefies at 73°, very soluble in water. The concentrated solution contains 47.8 per cent. of HBr, it boils at BROMUS blood BRONTË chitis. All varieties are generally pre- 126°, and has powerful acid properties; blood diseases. it neutralizes bases, forming bromides chitis. All varieties are generally preis only known in solutions; it has bleach- tions begin about the region of the is only known in solutions; it has bleaching properties. Bromine can displace chlorine from its compounds with oxygen, while chlorine can liberate bromine from its compound with hydrogen. Free bromine turns starch yellow.
Bromine has been applied externally as a caustic, but rarely. Its chief officinal preparations are bromide of ammonium, useful in whooping cough, infantile_convulsions, and nervous diseases generally; and bromide of potassium, now very extensively used, especially in epilepsy, hysteria, delirium tremens, diseases of the throat and larynx, bronchocele, enlarged spleen, hypertrophy of liver, fibroid tumors, etc. Also, as an dular swellings, and skin diseases. Its alterative powers are similar to but less than those of the iodides. Its preparation is the same as iodide of potassium, tion is the same as iodide of potassium, bromine for iodine-6KHO+Bre=5KBr +KBrO2+3H2O.
BROMUS (brome grass), a genus of grasses having two unequal glumes and two herbaceous glumelles, the outer one extremity. The seeds of B. mollus, or soft brome grass, when eaten by man frontal sinuses, passing from the nasal tions begin about the region of the frontal sinuses, passing from the nasal mucous passages, trachea, and windpipe to the chest, with hoarseness, cough, and pectoration. In acute cases the sputum is first thin, then opaque and tenacious, and laborious, the pulse quickened, and the skin dry. The danger increases in become involved, and, instead of the healthy respiratory sound sharp, chirping, whistling notes, varying from sonorous to sibilant. Chronic tensively prevalent, especially among in spring or autumn, or both, till it bein spring or autumn, or both, till it becomes more or less constant all the year round. we have