The =Douglas Fir= (_Pseudotsuga Douglasii_) is, in certain situations, a valuable timber-producing tree—indeed, as regards the actual production of timber in a given time, it is, perhaps, ahead of any other tree grown in this country. From measurements we have taken, the actual production of timber during fifty years was 240 ft., or nearly 5 ft. per year for half a century. In a plantation of the Douglas fir in Wales, planted twenty-two years, we found the average dimensions to be as follows: Height, 76 ft.; girth of stem at 24 ft., 4 ft.; cubic contents, fully 50 ft. The timber produced in this country is of excellent quality, being light but strong, works very readily, has a pleasant yellowish tinge, and takes on a good polish. That the Douglas fir is a tree that is eminently adapted for cultivation in this country is already well known; but to grow it in anything like a satisfactory way it must be planted in sheltered hollows, for extensive experience has long ago proved to us that it is ill-adapted for braving the storm, even at a few feet above the sea-level. Long ago we strongly advocated the forming of plantations of _P. Douglasii_ alone, or with some other tree of about equally rapid growth, for, when mixed up with the general run of our forest trees, the leader, on overtopping those of its neighbours, soon gets broken over, or otherwise presents an almost branchless, whip-handle-like appearance. We do not wish to say one word against this our favourite fir: but the truth must be told, and our own experience, gained principally on a low-lying seaside estate, where the tree was annually planted by the thousand, is that _P. Douglasii_ must occupy a sheltered situation if either ornament or utility be considered as points of first importance. The =Giant Arborvitæ= (_Thuja gigantea_) is fast coming to the front as a British timber tree, and has already, at the hands of far-seeing planters, received a fair amount of attention. After a fair and impartial trial on our part, we have found it to be perfectly hardy, even at high altitudes, a fast grower and rapid timber-producer, a non-fastidious subject as regards the quality of soil in which it is planted, and one of the most easily managed and most accommodating of trees. The quality of timber produced in this country is such as to warrant us in speaking highly of it, it being of a desirable yellow colour, fine-grained, easily worked, remarkably durable, and light in proportion to its bulk. From the measurements of fully twenty-four specimens scattered over an English park, we have found that the average annual rate of growth is 22 in., but even this is exceeded by young trees.