The Garden Under Glass

344 THE GARDEN UNDER GLASS without much attention, and gives a strong heat with practically no smoke or flame. On this account the flues do not get blocked up as with ordinary house coal or with coke. Anthra-cite coal requires a strong draught, but must not be poked so frequently as other fuel. It is dearer than other coal or than coke, but goes further, and when the question of labour is con-sidered I think it has the advantage over other forms of fuel. The prices, which fluctuate, should be watched so that a yearly supply may be got in when prices rule low. This usually occurs in the summer. Dusty anthracite should be avoided. Aphis.—A name given to green and black fly, which are very destructive, but if dealt with in good time this pest is not difficult to get rid of. See page 292, under Green-fly. Archangel.—Mats made of bast or the inner bark of the lime are given this name. They usually run to a little over a shilling each. A few should be bought each year for covering frames. With care in drying and storing them they will last two or three years. Artificial.—This is a loose term applied generally to Chemical manures or those which undergo some process of manu-facture and is used to distinguish them from natural manures. Directions for using patent fertilisers which come under this heading are given when the manures are sold, and should be strictly followed. If the dose be overgiven it is quite likely that harm will result. The use of crude “ artificial ” manures should not be indulged in by those who are inexperienced, although in view of the increasing difficulty of obtaining dung it is advised that an increased knowledge of these manures should be gained by study and experiment. Bank in or Bank up.—An expression used in connection with making up a greenhouse fire to last through the night. The points to remember are that the fire at the time be rather low, that it be freed from clinkers and ashes, that the live coals are spread evenly over the bars, that the large lumps of coal or coke be put in first, that this be followed by smaller lumps, that a layer of dusty coal, coke or wet ashes be put on last, and