This section of the book is from the "Household Companion: The Family Doctor" book
No one who cannot read should pour out a dose of medicine. Bottles containing poisonous drugs should be labeled poison, and such should, when practicable, be kept apart by themselves; and should, especially, never be left within the reach of children. Before pouring out or otherwise preparing a dose of medicine, look carefully at the label. No medicine should ever be kept in a bottle or other receptacle without a label. If a bottle which has contained one medicine is wanted for another, let it be thoroughly washed with hot water; and, on putting something new into it, change the label at once. If there is any doubt about the medicine in a bottle, throw it away, do not venture to use it without being sure of its nature.
After looking well at the label, before beginning to pour from the bottle, turn the labeled side away, so as not to pour over it; as some drops are apt to run down on the bottle, and might thus stain and obscure the label so that it could not be read.
Dropping medicine requires care and skill. To do it, moisten one edge of the top of the bottle with the contents of the bottle, and then, holding and tilting the latter in the right hand, with the left very slowly and cautiously withdraw the cork or stopper, until a drop rolls out. As this comes out, at once push the cork in, and then repeat the same process again and again, until the right number of drops has been obtained.
To give medicine (or liquid food) to a patient too ill to be lifted up in the bed, a bent glass tube is very convenient; and so are the half-covered spoons and cups sold by apothecaries. Glass vessels with the quantities marked on them are convenient.