════════╤══════════════════════════════════════════════════════════════ Quantity│ of │ solution│ GRAINS OF SALT OR DRUG REQUIRED TO MAKE SOLUTIONS OF to be │ PERCENTAGE STRENGTH INDICATED made │ ────────┼──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬────── │ 0.5% │ 1% │ 2% │ 3% │ 4% │ 5% │ 6% │ 8% │ 10% ────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼────── ½ fl. oz│ 1.15│ 2.3│ 4.6│ 6.9│ 9.3│ 11.7│ 14.1│ 19. │ 24. 1 fl. oz│ 2.3 │ 4.6│ 9.2│ 13.9│ 18.6│ 23.4│ 28.2│ 37.9│ 47.9 2 fl. oz│ 4.6 │ 9.2│ 18.4│ 27.8│ 37.2│ 46.8│ 56.4│ 75.8│ 95.8 3 fl. oz│ 6.9 │ 13.8│ 27.6│ 41.7│ 55.8│ 70.2│ 84.6│ 113.7│ 143.7 4 fl. oz│ 9.2 │ 18.4│ 36.8│ 55.6│ 74.4│ 93.6│ 112.8│ 151.6│ 191.6 5 fl. oz│ 11.5│ 23. │ 46. │ 69.5│ 93. │ 117. │ 141. │ 189.5│ 239.5 ────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴────── ════════╤═════════════════════════════════════════════════════════════════════ Quantity│ of │ solution│ GRAINS OF SALT OR DRUG REQUIRED TO MAKE SOLUTIONS OF PERCENTAGE to be │ STRENGTH INDICATED made │ ────────┼──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬────── │ 15% │ 20% │ 25% │ 50% │1:500 │1:1000│1:2000│1:3000│1:4000│1:5000 ────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼────── ½ fl. oz│ 36.8│ 50.2│ 65.│ 151.2│ 0.46│ 0.228│ 0.12│ 0.075│ 0.06│ 0.05 1 fl. oz│ 73.5│ 100.3│ 130.│ 302.5│ 0.91│ 0.456│ 0.23│ 0.15 │ 0.12│ 0.09 2 fl. oz│ 147. │ 200.6│ 260.│ 605. │ 1.8 │ 0.91 │ 0.46│ 0.3 │ 0.23│ 0.18 3 fl. oz│ 220.5│ 301. │ 390.│ 907.5│ 2.7 │ 1.37 │ 0.68│ 0.46 │ 0.34│ 0.27 4 fl. oz│ 294. │ 401.2│ 520.│1210. │ 3.64│ 1.82 │ 0.91│ 0.61 │ 0.46│ 0.36 5 fl. oz│ 367.5│ 501.5│ 650.│1512.5│ 4.55│ 2.28 │ 1.14│ 0.76 │ 0.57│ 0.46 ────────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴────── The table shows the quantity of drug required to yield a given _volume_ of solution of the percentage strength desired. Thus, to make one fluid ounce of a 5 per cent solution it is merely necessary to dissolve 23.4 grains of the salt in _sufficient water to make one fluid ounce_. THERAPEUTIC INDEX _Young’s Rule for Dosage_: The age of the child is divided by the age of the child plus 12, and the result is the appropriate dose for the child. The doses given below are for the adult unless otherwise specified. =Absorbent.= A medicine or dressing that promotes absorption, such as potassium iodide, Tr. iodine, glycerine, or hot vaginal douches. =Adrenalin.= The blood-raising principle of the suprarenal glands. It is hæmostatic and astringent. Acts somewhat like digitalis on the heart. _Uses._—Vomiting of pregnancy, increased glandular activity, hæmorrhage, inflammation of mucous membranes.