Curdle a half pint of milk with the same quantity of vinegar; separate the curd from the whey, and mix the latter with the whites of four or five eggs, beating them well together. Add a little quicklime, through a sieve, to ' make a thick paste. This cement dries quickly and resists the action of fire and water.

Another cement may be made by stirring plaster of Paris into a thick solution of gum arabic, bringing it to the consistency of cream. This is white in color and is very well adapted to mend china. After three days it cannot be broken in the same place.

Still another is made of four ounces of crushed orange-shellac, and three of strong rectified spirits of wine or wood naphtha. The spirits of wine is preferable. Dissolve the shellac in the spirits, in a corked bottle kept in a warm place. The process is aided by shaking, and the composition must be shaken before using. It can be used as a varnish for unpainted wood.

To mend glassware, dissolve boiled isinglass in spirits of wine, half the quantity of spirits being added to the isinglass. This is a transparent cement, which makes it very suitable for mending glassware.