Although the foregoing list of requirements may seem rather formidable, yet amongst the trees whose names now follow there will be found some which meet many, if not all of these requirements, and which, if properly planted with all reasonable care, may be expected to thrive if planted at the sides of the streets in any town in this country. LIST OF TREES SUITABLE FOR PLANTING AT THE SIDES OF STREETS. Western Plane. Lime. Maple. Horse Chestnut. Elm. Tulip tree. Lombardy Poplar. Ash. Willow. Beech. Birch. Oak. Sycamore. Copper Beech. Pawlonia. Ailantus Glandulosa. Laburnum. Lilac. Almond. Peach. Hawthorn. Acacia. Double Cherry, etc. Of the above list the western plane for many reasons is the most desirable. Its freshness when it bursts into green buds is well known, and it is proverbial for its hardiness. The lime was at one time the most popular tree for this purpose, but it has several defects, the most notable being that its leaves wither before the summer is over, and the tree assumes a lifeless look at a time when most shade and freshness are required of it. Of the remainder of the trees I have enumerated some are slow in growth, which is a considerable drawback; others are not wholly free from being affected by cold winds in the spring or by lice in the winter, and the assistance of an expert is very necessary in selecting trees for this important purpose. Whatever trees are selected, the following precautions should be taken: The young tree should have been well nourished in its nursery before removal, and should on no account be planted in the street until its stem is nearly 10 feet in height and about 3 inches in diameter. The stem should be clean and straight, and the whole tree symmetrical. The great difficulty in this country is to obtain sufficient numbers of trees of the exact size and description, when it becomes necessary to plant out a street. They have often to be imported, when it is found that they are frequently unsuited both for soil and climate, besides being very costly; thus many failures have arisen in consequence. To obviate this necessity in Paris the Government have for many years instituted and maintained special nurseries where trees are grown for this purpose alone, these nurseries being situated at Passy, the Jardin Fleuriste, and Petit Buy, no less than 115 men being constantly employed in the work. Some further particulars will be given presently on the cost of this work. The trees thus nourished and selected should be planted in the autumn, for there is a well-known saying that “a tree planted before Christmas can be _ordered_ to grow; if planted after Christmas it must be _asked_ to do so”; and there is no doubt that if trees are planted too late in the season great difficulty in getting them to grow is generally experienced.