142 ON PRUNING FOREST TREES, ETC. 
interesting in autumn than the brilliant foliage of the scarlet 
oak. The family of maples are among the best for autumn 
embellishment, all of which may be inserted on the sycamore 
or on the Norway species. The scarlet, double-flowering, and 
other varieties of thorn, scarlet horse-chestnut, purple beech, 
weeping ash, and weeping elm of sorts, are all worthy of cul- 
tivation. The common trees of the species form the stocks 
best adapted for being engrafted with the rarer sorts, and 
the nearer the kinds are related, the union is rendered the 
more perfect and permanent. 
