Continuing our hints on tasteful landscape gardening, we give this month some views of Glenview, the residence of John B. Trevor, Esq., of Yonkers, in order to illustrate a point made last month, that architects seldom take into consideration how much the architecture itself is affected by its position. A house may look pretty enough when examined in the specimen book at the architect's office, and yet when erected impress one very unfavorably by reason of the surroundings. To use an expressive phrase, it is out of harmony. As stated in the chapter already referred to, a tall turreted or castellated building looks best on an eminence - while a low broad building shows to best advantage on a low broad plateau Mr. Trevor's residence looks admirable on the elevation as presented - but would be wholly out of character on a level plain. The gardening proper of this beautiful place is on the other side of the house, and of which the smaller picture gives a glimpse - we see just enough to understand that the little ornamentation the larger view presents, gives the stronger pleasure to the garden proper when we reach it.

It is these contrasts and harmonies that go to make up much of the great pleasures of good landscape gardening.

Glenview: The Residence of John B. Trevor, Yonkers, N. Y.

Glenview: The Residence of John B. Trevor, Yonkers, N. Y.

Increased attention has been given the Rhododendron and Azalea the few past seasons, as they prove to be much more easy to manage than people formerly thought. It is found to be a mistake that they need shade. It is only a cool soil they require. This is made by deepening it, and adding to it material, which will keep it open and porous at all seasons. We accomplish this by adding fine brushwood with the heavy clay loam. Those who have them in good growing order should take care to keep them in good health by occasional top-dressing. This they enjoy, as the little hair-like roots fancy feeding in cool places, near the surface. It has been found in the vicinity of Philadelphia that well-decayed cow manure is used to very great advantage as a dressing for these plants. There is considerable difference in the hardiness of some of the varieties. The original species that gave birth to this race of beautiful kinds, is the Rhododendron Catawbiense of the mountains of North Carolina, a very hardy species, and the Rhododendron Ponticum, from Asia Minor, which is tender. Just in proportion as the constitution of each parent predominates is the relative hardiness of the offspring. The same kind that would be hardy in the old world with its moist atmosphere, may be tender in our clear dry climate.

Great care therefore is required in the selection of varieties, to get those in which the R. Catawbiense preponderates. The Rhododendron maximum - the Mountain Laurel of some of our people, though the Wood Laurel, Kalmia latifolia, sometimes gets the name - does not seem to have entered much into the hybridism of this beautiful tribe. It flowers later, and this may be one reason. It cannot be that "hybrids are sterile." for Rhododendron hybrids, as well as most other hybrids are as fertile as can be. The Rhododendron maximum however is well worthy the attention of American planters.

Summer pruning is very advantageous on trees and shrubs, and it is surprising that it is not more practiced. A judicious thinning out while the tree or shrub is growing, would save much work in the winter season, when it is too often the custom to get the cowboy with a shears or a laborer with an axe or saw to crop off the head, and irretrievably ruin things. The finger and thumb on the young branches of pines while they are growing, have a wonderful effect on the beauty of the tree. Evergreen trees love pruning as well as deciduous. The Scotch pine and the Chinese Arbor Vitae, are two plants which derive wonderful benefit from the pruning knife. Both these are very liable to get ragged when left entirely to their natural inclinations, but grow with a beautiful compact luxuriance under the occasional application of the knife. Indeed the Scotch pine with judicious pruning makes one of the most beautiful ornaments of the lawn and pleasure ground. It can be made to take many odd forms; one of the most picturesque is obtained by cutting off its head when about ten feet high, and never let another leader grow.

The side branches are all cut away except the upper tier, these spread then outwardly - not exactly creeping but flowing forward in the most luxurious green imaginable, making a much prettier arbor than any weeping tree we ever saw.

These peculiar objects are very striking in a flower garden, and other things besides evergreens will furnish them. Deciduous shrubs may often be trained into interesting forms. The Wistaria sinensis, for instance, makes a very interesting ob-ject trained as a small tree. If tied up to a stake for one or two years, and then suffered to stand alone, it will make a pretty round head, and when in spring the pendant blossoms are in profusion, it makes a unique ornament on a lawn.

So many roses have been sent out on the Man-etti stock, that great care will be needed to watch for and take off the suckers as they appear, or in a year or two they will kill the grafted part; one can soon educate the eye to distinguish between a Manetti and the kind grafted on it.

Hybrid perpetual roses are classed among the ever-blooming ones, but whether they bloom freely in autumn or not, depends much on treatment. The flowers at this season should be cut off at once as they fade. It is from the new buds which push from under the old flowers that comes the autumn blooms. All roses bloom the better in their succession for having their flowers cut as they fade.

Side Terrace at Glenview.

Side Terrace at Glenview.

A very interesting occupation is the raising of roses from seed. General Jacqueminot seeds freely, and makes a good parent. A few blooms may be left to mature on this variety.

Towards the end of June propagation by budding commences. This is very commonly employed with the rose; but ornamental trees and shrubs may be increased in the same way. Closely allied species must be chosen to work together.

Propagation by layering may be performed any time when strong, vigorous growing shoots can be had. Any plant can be propagated by layers. Many can be readily propagated no other way. Cut a notch on the upper side of the shoot, not below, as all the books recommend, and bend down into, and cover with rich soil. In a few weeks they root, and can be removed from their parents. Stakes for plants should be charred at the ends before using, when they will last for years.

The rose bugs are apt to be very annoying at some seasons. The best remedy is to shake them off into a pail of water. The rose slug is often very injurious to the leaves - completely skeletonizing them. All kinds of rapid remedies have been proposed - whale oil, soap, petroleum, etc., but the best thing of all is to set a boy to crush them by finger and thumb. It is astonishing how rapidly they are destroyed by this process. This is true of most of the larger insects. Hand picking or crushing is by far the best remedy.

Peg down roses where a heavy mass of flowers is desired. The side shoots push more freely for this treatment. Roses may be propagated by layering as well as other plants.