Plants as Affected by Light. 135 
door culture, screens of lath (Figs. 60, 61), cloth or brush (Fig. 
62) are often placed over beds containing cuttings or tender 
Fie. 62. Brush screen, for shading tender plants in the open ground. (After 
Bailey). 
seedlings, as of many cone-bearing trees. Cuttings in the 
nursery are readily shaded by supporting a board over the 
row, on short stakes (Fig. 63), so as to protect them during 
the warmer hours of the day. Shingles, flower-pots or large 
green leaves, as of the burdock, are useful for shading plants 
of the cabbage, tomato etc. 
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Fic. 63. Board shade for recently set plants, or for cuttings not yet rooted. 
In culture under glass, the glass itself is very often thinly 
washed with lime or clay to render it partially opaque, or 
lath screens are used either above or below the glass. On 
greenhouse benches, sheets of thin paper, or light cloth 
screens, are useful for shading cuttings, recently planted 
seedlings and germinating seeds. 
Shading should never be so put on as to prevent a free 
circulation of air about the plants. 
A shade that obstructs only a part of the rays of sun- 
light at a time, as does the lath or brush screen, is gen- 
