There are two important points to remember in ce-manting glass: first, to get the glass clean, and second, to press the surfaces together after applying the cement, to squeeze out as much of the cement as possible, and to keep them pressed together until the cement is hard. To clean the glass wash it thoroughly with soap and water, rinse, and dry with a clean cloth.

There are many excellent glass cements on the market. Some of these are solid and are used only on hot glass: others are liquid and are used on cold or hot glass.

Fig. 92. Cementing Glass

Cement two strips of glass together (Fig. 92) with sealing- wax or solid shellac or some other solid cement as follows : Clean the glass thoroughly, place in the oven or on the stove, heat gradually until the glass just melts the cement, rub the cement over both surfaces, bring them together when the cement is fluid, press them together to squeeze out as much cement as possible, and keep them pressed together until the cement is hard.

Cement a strip of wood to a strip of glass in the same way.

Cement a strip of wood to a strip of glass with liquid glue, both wood and glass being cold. Keep them pressed together until the glue is dry, perhaps a day or two.