Show useful med c ne bottle in europe there is in common use a medicine bottle with a glass stopper which has a tiny groove running down one side of it which corresponds to a tiny groove in the neck of the bottle these are used for medicines that must be dropped such as and strychnine and when the stopper is turned with the groove toward tha in the bottle the medicine drops out easily and not too rapidly but when finished the stopper need only be turned back so that the two grooves do not coin coincide cid and the medicine Is protected from the air thus it is not necessary to remove the stopper from the bottle from the time it is filled until the medicine has all been used |