402] G RE mix t'ro. parts of the latter with o?h' part of the former ; then procure a hot and clarified solution of pot-ash, three parts of which will be re- quired to precipitate the mixture. above specitied. After it has suckl- ed, the fluid part should be decant- ed, and the sediment evaporated to dryness over the tire, tiil it assumes a green colour. Before, however, this pigment can be used, it ought to be repeatedly washed with filter- ed water : thus it will become fit both for oil and water-colours, as it is sufficiently fixed to withstand the effects of the air and sun ; for the inventor has ascertained its su- perior durability by more than ten years experience. He adds, that painters may, by means of this pre- paration, combine their yellow and ultramarine, so as to form a very beautiful and permanent green. GREEN-FINCH, a species of the Fringilla, L. a charming little bird, which has a strong tinge of green diffused over its whole body; the wings and tail are black, but variegated with yellow. The green -finch may be easily domesticated, by carrying it into a dark place, putting it upon one fin- ger, and gently touching its breast with a finger of the other hand. Thus, by a few caresses, and gra- dually admitting day-light, this lit- tle creature may be accustomed to •eat any bruised seed out of the hand, and will then continue tame. With respect to the proper food for green-finches, and their treat- ment when in a diseased state, Ave refer to the article Golo-fincu. GfiEEN-HOUSE, a conserva- tory or erection in gardens, for the purpose of sheltering the more cu- rious and lender exotics from the • ux variable climate, espe- cially during the winur season. GR E The length of green-houses ougfi£ to be proportioned to the number of plants intended to be kept, or rais- ed. Their depth in small houses should not exceed 12 or 14, and in large ones, 13 or 20 feet. The windows should reach from about 1 1 foot abqve the pavement to near- ly the same distance from the ceil- ing, so as to admit of a cornice be- ing constructed round the build- ings, over the tops of the windows. The breadth in the smaller con- servatories ought not to be more than 3 or 5^, and in the larger ones 7 cr/yfeet: as they will other- wise become heavy and inconve- nient. The floor ought to be paved with Purbeck-stone, or fiat tiles, ele- vated 2, or if the situation be damp, 3 feet above the surface of the. ground ; it will also be advisably to carry a flue, about 10 inches wide, and 2 feet deep, beneath the floor, through the whole length of the house, and to return it along the back part, where it should be carried up into funnels, for the pur- pose of discharging the smoke. Jn the inside, shutters should be made so as to fold back upon the piers, that the rays of the sun be not im- peded. The inner wall of the build- ing ought to be either covered with stucco, or plastered with mortar, in order to exclude the frosty air. But, if the walls be wainscottcd, it will be requisite to plaster the in- termediate space with lime and hair: the ceiling and walls or wainscot ought, however, to be white-washed, so that the rays of t i iun may be reflected through- out the building. W bile the front of the conserva- tory is placed directly south, the two wings .slioulel be respectively
- 9lXangcd to lace the south-cast and
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