I

Glue............ 3.5 ounces

Glycerine........ 8 ounces

Water, a sufficient quantity. Pour upon the glue more than enough water to cover it and let stand for several hours, then decant the greater portion of the water; apply heat until the glue is dissolved, and add the glycerin. If the mixture is too thick, add more water.

II

Glue............ 6 ounces

Alum............ 30 grains

Acetic acid....... 0.5 ounce

Alcohol.......... 1.5 ounces

Water........... 6.5 ounces

Mix all but the alcohol, digest on a water bath till the glue is dissolved, allow to cool and add the alcohol.

III

Glue............ 5 ounces

Water............ 1 ounce

Calcium chloride.. 1 ounce Dissolve the calcium chloride in the water, add the glue, macerate until it is thoroughly softened, and then heat until completely dissolved.

IV

Glue............ 20 ounces

Glycerine........ 5 ounces

Syrupy glucose. .. 1 ounce Tannin.......... 50 grains

Cover the glue with cold water, and let stand over night. In the morning pour off superfluous water, throw the glue on muslin, and manipulate so as to get rid of as much moisture as possible, then put in a water bath and melt. Add the glycerine and syrup, and stir well in. Finally, dissolve the tannin in the smallest quantity of water possible and add. This mixture must be used hot.

V

Glue............. 15 ounces

Glycerine......... 5 ounces

Linseed oil........ 2 ounces

Sugar............ 1 ounce

Soak the glue as before, melt, add the sugar and glycerine, continuing the heat, and finally add the oil gradually under constant stirring.

This must be used hot.