Waters-aromatic

Aromatic waters are clear, saturated aqueous solutions (unless otherwise specified) of volatile oils or other aromatic or volatile substances. Their odor and tastes are similar, respectively, to those of the drugs or volatile substances from which they are prepared, and they are free from empy- reumatic and other foreign odors. Aromatic waters may be prepared by distillation or solution of the aromatic substances, with of without the use of a dispersing agent.

Aromatic waters may be prepared by one of the following processes:

Distillation Method — Place the odoriferous portion of the plant or drug from which the aromatic water is to be prepared in a suitable still with sufficient purified water, and distil most of the water, carefully avoiding the development of empyreumatic odors through the charring or scorching of the substances. Separate the excess of oil from the distillate, and preserve or use the cbar water portion, filtering, if necessary. Solution Method — Shake 2 g or 2 ml (if a liquid) of the volatile substance (suitably comminuted if a solid) with 1000 ml of purified water in a container of sufficient capacity, and repeat the shaking several times during a period of about 15 min. Set the mixture aside for 12 hours or longer, filter through wetted filter paper, and add purified water through the filter to make the product measure 1000 ml.

Alternative Solution Method Thoroughly incorporate the volatile oil (or the suitably comminuted volatile solid) with 15 g of talc or with a sufficient quantity of purified siliceous earth or pulped filter paper. Add 1000 ml of purified water, and thoroughly agitate the mixture several times during 10 min. Then filter the mixture, returning the first portions, if necessary, to obtain a clear filtrate, and add purified water through the filter to make the product measure 1000 ml.

Aromatic waters require protection from intense light and excessive heat.

IV. Speaking.

1. Знайдіть в обох текстах уроку речення з інфінітивом та його

конструкціями, визначте його функції, перекладіть на українську мову.

2. Опишіть методики приготування настойок, використовуючи наведені слова та словосполучення, а також, де це можливо, інфінітив та інфінітивні конструкції:

mix, allow, stand, transfer, rack, pour on, saturate, cover, liquid, drip, macerate, proceed, produce, collect, dilute.

Solutions

1. Active vocabulary.

homogeneous		однорідний
saturation		насичення
solute		розчин
solvent		розчинник
dissociation		дисоціація, розпад
covalcm		ковалентний
variable		різноманітний, змінний
emulsion		емульсія
chloroform		хлороформ
partial		частковий
to evaporate		випаровуватись
medium		середовище