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Plate XVII. The Canadian hemlock, when grown from the northern seed and when well established, forms one ofthe best windbreaks and barriers for the protection of the garden or orchard wherever drifting snow must be overcomeand seclusion also attained. (See page 125, group XII-C)
Plate XIX. The extended lawn area often requires specimen trees to lend scale and colour to the picture, and italso offers opportunity to display the natural beauty of many of our fine specimen trees. (See page 133) it is essential during the cooler hours of the day, and at frequent in-tervals, to spray these plants to wash off much of the soot which col-lects from the atmosphere. While the leaves of evergreens areheavily covered with a layer of cuticle, the breathing pores are verysusceptible to clogging from the dust of a polluted city atmosphere. |
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