the shutters resting on a wheel which in its turn rolls on a rod of iron; the shutters are connected with another rod, which is pushed forward or drawn backward by a ratchet-wheel at one end. There is another glass window ventilator near the top of this wall, which slides by the inside of the wall in opening and shutting. The front side of the roof is pitched at 36°, the back side at 32°; the roof sashes are whole to within 3 feet of the ridge, where in each commences a sash 3 × 2 feet, which is hung in the middle, and connected with a rod, e, which has at each window a ratchetwheel playing into a ratchet on the window; this rod may be turned at one end, and all the windows opened or shut at once, or each window may be disconnected by slipping its own ratchet-wheel along, and then be opened or shut independent of its fellows; dis the supporting post, of which there are five, of cast iron; these posts support and tie the ridge and the two sides of the roof. At 20 feet from one end there is a glass partition, which enables that portion to be shut off from the rest, and heated and cooled at will. The back wall is 7 feet high, and is two bricks thick; it is solid, with the exception of the openings shown in the plan for ventilators, doors, windows, etc. Each wall and the centre posts rest on solid

stone masonry, 2 feet deep. which make the circuit of the

The house is heated by two pipes, inside under the

side plant tables; each pipe comes from the boiler straight, a, and then sends off two branches at right angles, b, bending at the corners, and crossing each other at the front of the house opposite the boiler, where each is depressed so as to return to the boiler below the point of departure. Thus the house is uniformly warmed, each

a

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side receiving the water hot at starting, whilst in each the return water is cooled equally before returning to the boiler. A branch pipe crosses the house each side the partition, to make circulation in case we wish to heat one part more than the other. The boiler is in the lean-to shed back of the greenhouse, and is supplied with fresh water from the rain-water cistern, B, and when there is not rain enough to keep the cistern full it is filled by the force pump in the well. The furnace is partly above and partly below the

floor of the shed, and the firehole and the coal are approached by steps. The coal cellar extends outside the building, where there is a coal trap. I is a chamber for a man to sleep in; j, the shelves on which plants are to be potted, and under which pots, crocks, etc., are to be kept. The plants in the greenhouse are variously provided for according to their kinds and necessities. The table, e, in the centre, is for large plants, and those, like Camelias, which do not need the direct light. Under this table is room to lay away bulbs, and Fuschias which, having blossomed in the summer, will be allowed to remain nearly dormant until growth recommences in spring, and all other dormant plants. On the other shelves other plants will be kept, just as they need more or less direct light and heat. Along the rafters and crossing the glass in various places may be trained Running Roses, Passion-Flowers, etc.

And now for the work! The first of this month thoroughly examine the house, the glass, the paint, the shelves, scrub all the wood-work clean, and thoroughly whitewash all portions exposed to mildew; fumigate with sulphur, to kill red spiders, etc., before the plants are taken in; paint the wood-work wherever water or wear has removed the paint, and make sure that no loose joints will admit rain and cold. Collect at once leaf mould, good loam, and white sand enough for the compost for all your plants; lay in your broken crocks and whole pots. Continue to pick off dead leaves; prune and repot all the stock plants not bedded in the ground; repot all that have outgrown their quarters, and remove the top mould from the others and add a fresh supply; begin to take up and pot all the cuttings and layers made during the summer. Pot carefully a large quantity of Dwarf and Giant Chrysanthemums, Salvias, Carnations, Gilly flowers, Ten-week Stocks, Tuberoses, Amaranths, and such other plants as may be just coming into bud, to be got ready to exhibit in the conservatory during October and November. Pot Neapolitan Violets, Cyclamen, Pansies, Chinese Primroses, Oxalis. Repot Heliotropes, Cinerarias, and Callas; separate and repot Mignonette and Sweet Alyssum; repot Verbenas for last time. When they are potted, keep them in the shade for a few days, till they are established in the pots, and then put them on the shelves in the