Open-air cultivation, at no time important, has now almost disappeared, except in a few sheltered localities in and around the middle Meuse valley between Namur and Dinant, and around Huy. The acreage declined from 300 hectares in 1865 to 80 hectares in 1910, and the present figure is insignificant. It represents a hobby rather than a commercial undertaking, the fruit being for domestic use. Commercial cultivation under glass dates only from 1865, when the first glasshouses or serres were established by the Sohie brothers at Hoeilaart about 10 miles south-east of Brussels.2 Recent agricultural statistics do not distinguish between grapes and other glasshouse produce, but the 1929 returns (the last year in which a distinction was made) show 293*9 hectares, or 726 acres, of grapes under glass. 3 It is known that great expansion occurred up to 1932, and the present acreage must be at least 350 hectares or some 900 acres. The map of grape production (Fig. 2) is based on the 1929 returns, and shows that the Hoeilaart district south-east of Brussels wTas then still, as it is to-day, the centre of the industry, with minor production all round Brussels and some of the larger towns such as Ghent, Charleroi, and, to a lesser extent, Antwerp. Clearly the Ardennes and most of the Campine region of the north are negative areas, though a few large nurseries occur in the eastern Campine near Peer. The remarkable concentration near Brussels is such that, of the Belgian 1929 total of 293*9 hectares, no less than 244*9 or 83 per cent. were within the three cantons of Ixelles, Louvain, and Wavre, immediately southeast and east of Brussels.