3775. Gum Water.—It is a fact not generally known that gum should be dissolved in vinegar instead of water, especially when it is wanted for immediate use.
3776. To remove Water-stains from Black Crape.—When a drop of water falls on a black crape vail or collar, it leaves a conspicuous white mark. To obliterate this, spread the crape on a table (laying on it a large book or a paper weight to keep it steady), and place underneath the stain a piece of old black silk. With a large camel's hair brush dipped in common ink, go over the stain; and then wipe off the ink with a little bit of old soft silk. It will dry immediately, and the white mark will be seen no more.
3777. Copper in liquids maybe detected by spirits of hartshorn, which turns them blue.
3778. Arsenic may be detected by a solution of blue vitriol dropped into the suspected liquid, which will turn green, if arsenic be present.
3779. To remove Ink Stains from Silver.—The tops and other portions of silver inkstands frequently become discolored with ink, which is difficult to remove by ordinary means. It may, however, be completely eradicated by making a little chlorid of lime into a paste with water, and rubbing it upon the stains.