Age--_Years_ 80 65 50 25-40 20 16 12 8 5 2
_Doses_ 5/8 3/4 7/8 1 7/8 3/4 5/8 1/2 3/8 1/4
" _Months_ 12 6 2 1
_Doses_ 1/5 1/8 1/15 1/24
=DOUCHE.= [Fr.] _Syn._ DOUCHE BATH. A species of bath much employed by
hydropathists, both for the relief of local affections, and to give a
healthy stimulus to the whole system. The douche consists of a single jet
of cold water, varying in size from the thickness of a quill to that of a
man's arm; it is projected with great force, either from above, below, or
on one side, upon a particular part of the body. See BATH (Shower).
=DOUGLAS' DISINFECTING POWDER.= A mixture of sulphite of calcium, chalk,
and carbolic acid, or of sulphite and carbonate of lime.
=DOVER'S POWDERS.= See POWDER.
=DRAB DYE.= 1. (FOR COTTON.) For 40 lbs. Boil 6 lbs. of fustic; scald
2-1/2 lbs. of Lima wood and 2 lbs. of sumach. Decant into a wooden vessel,
capable of containing 100 gallons; reduce with cold water to handling
heat; enter, 6 turns; wring out; sadden with 8 ounces of copperas; 4
turns; wring out again, and give 4 ounces of bluestone.
2. (FOR SILK.) For 100 yards. Boil 4 lbs. of fustic and 6 ounces of
logwood, 2-1/2 ounces of cudbear, 1-1/4 ounce of copperas. Cool to 200°
Fahr.; enter, winch 20 minutes; air out; repeat; then take a little of the
liquor out of the boiler, dissolve the copperas, reduce it to handling
heat with water, and give one or two shots through it, as the pattern
requires; one water out of the saddening; then give a warm but weak sour
to clear the colour, wash in two waters, and dry.
3. (FOR WOOL.) _Dark drab._ For 50 lbs. 7 lbs. of fustic, 8 ounces of
madder, 4 ounces of cudbear, 2 lbs. of alum, 8 ounces of tartar. Enter
between the cold and 160° Fahr.; after heating up boil from 10 to 30
minutes; wash in two waters. All dark shades of this may be slightly
prepared with chrome; wash in two waters.
4. (FOR WOOL.) _Light drab._ For 56 lbs. 4 lbs. of fustic, 1-3/4 lb. of
alum, 4 ounces of madder, 4 ounces of tartar, 3-1/2 ounces of cudbear.
Work as for dark drab.
=DRACONINE.= _Syn._ DRA'CINE, RED RESIN OF DRAGON'S BLOOD. A peculiar
vegetable principle discovered by M. Melandre in dragon's blood.
_Prep._ Dragon's blood is dissolved in alcohol, the solution filtered,
concentrated, and precipitated with cold water; the red, spongy
precipitate is well washed, neutralised with dilute sulphuric acid, again
liberated by means of an alkali, and well washed with water.
_Prop., &c._ Draconine has a fine red colour; is tasteless, inodorous, and
flexible; it fuses at 131° Fahr. The smallest quantity of carbonate of
lime in filtering paper may be detected by sulphate of draconine, the
yellow colour instantly turning red.
="DRAGEES AU LACTATE DE FER."= (Gélis & Conté.) 100 grammes of lactate of
iron made into 2,000 very small pills with powder and mucilage of
marshmallow, and coated with eleosaccharate of anise. (Reveil.)
=DRAGEES DE COPAHU DE FORTIN.= 30 grammes balsam of copaiba made into 72
dragées, with 1·2 grammes calcined magnesia, and coated first with gum
arabic and then with sugar. (Reveil.)
=DRAGEES DE CUBEBE AU COPAHU.= Cubebines (Labelonye). 2 parts balsam of
copaiba, 2 parts extract of cubebs, 1 part yolk of egg, with sufficient
liquorice powder to make a mass, which is divided into oblong pills, each
weighing 7 decigrammes. These are dried and coated with white or raw
sugar. (Hager.)
=DRAGEES DE POUGUES.= (Garnier.) Chloride of calcium, 50 parts; chloride
of magnesium, 50 parts; chloride of iron, 10 parts; dissolved in water and
precipitated with sodium carbonate. The precipitate is washed, pressed,
and mixed with 100 parts bicarbonate of soda. Of this mixture 25 parts are
made into a mass with 475 parts of a paste of sugar, peppermint, oil, and
mucilage. The mass is then divided into dragées weighing 5 decigrammes,
which are coated with gum and sugar. (Reveil.)
=DRAGON'S BLOOD.= _Syn._ SANGUIS DRACONIS, L. A rich red-coloured resin,
obtained from various species of the genus _Calamus_. Its colour, in the
lump, is a dark brownish-red; in powder, bright red. It is friable, breaks
with a shining fracture, and has a sp. gr. not higher than 1·196 or 1·197.
When pure, it readily dissolves in alcohol, ether, and oils, yielding rich
red, transparent solutions. Adulterated and factitious dragon's blood is
only partly soluble, and lacks the rich colour of the genuine article.
Dragon's blood is chiefly used to tinge varnishes and lacquers.
=Dragon's Blood, Factitious.= _Prep._ 1. Shell-lac, 4 lbs.; melt, remove
from the fire, and add, Canada balsam, 6 oz., and gum benzoin, 2 oz.;
mix well, stir in red sanders wood, 1-1/2 lb., and Venetian red, 3/4 lb.
(both in fine powder); and form the mass into sticks.