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of the mercury in the distal limb of the manometer ; the mean point of maximum oscillations registers the diastolic pressure. If the pressure in the bag is still further .ncreased, the oscillations diminish in ampli- tude chinese herbal viagra tiger and finally disappear, and at this viagra cost per pill point the pulse can no longer be felt at the wrist. The height of the mercury supported then registers the amount of systolic pressure. It will then be noted that the mercury has descended in the proximal limb of the manometer, and has ascended in the distal limb of the manometer: the difl'erence between the two mercurial levels will be the blood pressure of the brachial artery. The normal systolic pressure in man is about 120 mm. Hg, and the diastolic pressure about 100 mm. Hg. In women the pressures chinese herbal viagra tiger are about 10 per cent. less. In children the systolic pressure may be as low as 90 mm. Hg, with a diastolic pressure of about 80 mm. Hg. (R. Hutchison.) 6. The respiratory center is situated in the lowest part of the floor of the fourth ventricle at the calamus scriptorius. viagra cost per pill 7. Secretions: Sebum, mucus, serous fluid, tears, saliva, gastric juice, succus entericus, pancreatic juice, bile, milk, sweat, urine, seminal fluid, and the various internal secretions. Excretions : Urine, carbon dioxide, sweat. 8. Six abnormal constituents of urine: Albumin, sugar, blood, pus, bile, and indican (in excess). CHEMISTRY. 1. Four elements that are gases: Hydrogen, H; oxygen, O; chlorine, CI; nitrogen, N. 2. The molecular tveight of water: H = 1, O = 16; H,0 = 18. 3. Ammonia, NHs; Ferric chloride, FejCl..; Hydro- cyanic acid, HCN; Laughing gas, NjO; Ethyl alcohol, C,H;OH; Benzene, C»H„. 4. HNO, + KOH - KNO3 -f H,0. 5. CaO -f H,0 - Ca.H.O,. 6. Carbon, hydrogen, oxygen, nitrogen. 7. The simplest saturated viagra cost per pill hydrocarbon is methane, CH,. 8. Fehling's solution is a mixture of copper sulphate, caustic soda and potassium tartrate. It is used as a reagent in testing urine for sugar. MATERIA MEDICA. 1. Digitalis. Habitat, Europe; common name, fox- glove; tincture of digitalis, dose 15 minims. Gelsemium. Habitat, Southern United States; com- mon name, yellow jasmine; tincture chinese herbal viagra tiger of gelsemium, dose 8 minims. Belladonna. Habitat, Europe and Asia Minor; com- mon name, deadly night shade; tincture of belladonna leaves, dose 8 minims. ASPIDIUM. Habitat, Europe, Northern America and Northern Asia; common name, male fern; oleoresin of aspidium, dose 30 grains. Physostigma. Habitat, tropical Western Africa; common name. Calabar bean, or ordeal bean; tincture of physostigma, does 15 minims. Colocynth. Habitat, Southern Asia and the coun- tries bordering the Mediterranean Sea; common name, bitter apple; extract of colocjmth, dose Vz grain. Veratrum viride. Habitat, North America; common name, hellebore; tincture of veratrum, dose 15 minims. 2. Tivo derivatives of morphine : Apomorphine: emetic dose of apomorphine hydrochloride 1/10 grain. Heroin, dose 1/18 grain. 3. Dover's poivder contains ipecac 10, powdered opium 10, and sugar of milk 80. Scidlitz powder contains potassium and sodium tar- trate 120 grains, sodium bicarbonate 40 grains and tartaric acid 35 grains. Black ivash contains 30 grains of calomel in 10 ounces of lime water. Carron oil contains equal parts of viagra cost per pill lime water and linseed oil. Folder's solution contains arsenous acid 1, potassium bicarbonate 2, compound tincture of lavender 3, and distilled water to 100. 4. The salts of the alkaloids are, as a rule, chinese herbal viagra tiger soluble in water, whereas the alkaloids are but slightly soluble in water. For this reason the salts are more generally used than the alkaloids themselves. Five alkaloidal sulphates: Morphine sulphate, dose 1/4 grain; strychnine sulphate, dose 1/64 grain; atropine sulphate, dose 1/160 grain; quinine sulphate, dose 4 grains; codeine sulphate, dose 1/2 grain. 5. Ten di-ugs whose internal use may cause a skin eruption: Bromine and the bromides, iodine and the iodides, cubebs, copaiba, salicylic acid, quinine, turpen- tine, antipyrin, belladonna, chloral. 6. Chemical antidote for arsenous acid, freshly pre- pared solution of ferric hydroxide; for bichloride of mercury, white of egg, or milk; for iodine, starch; for Oct. 9, 1915]