Hand Glasses
These are very useful as temporary coverings for plants that are too tender for being fully exposed. They are also utilised in propagating various subjects, as the top part may be readily removed and easy access thus secured for attending to whatever is inside. Various shapes are made, the bases being generally square, hexagonal, or octagonal. The first-named is the most convenient shape and if the framework is constructed with copper or cast iron and kept painted, it lasts a long time, and answers well. Air may be admitted by tilting up the movable top, or the latter may be taken off and replaced at will. Hand Glasses, when employed for propagating purposes, should be glazed airtight, by having the glass fitted into the framework without laps.