T E R 



T E T 



portionable width ; designed in garden* as a 

 high, airy walk, to command a better preen ot 

 of the adjacent places around, within and w iih- 

 ovit the garden occasionally, as well a> to enjoy 

 the fresh air in summer more Freely- In ihc 

 former st\le of laving out gardens, it was con- 

 sidered as very ornamental, but is at present 

 much in disuse. 



The height of a Terrace-walk may be more or 

 less as the situation admits, as from one foot to 

 one or two yards ; or even three or four yards 

 or more in particular situations, and where time 

 are plenty of earihv materials, rubbish, &c. to 

 form it, allowing breadth in proportion, from 

 five to ten or twenty feet or more, and extended 

 to any length required. They are sometimes 

 formed on some naturally high, rising around, 

 to save as much trouble as possible, in bringing 

 stuff from a distance ; and sometimes raised 

 wholly of forced materials. 



The situation for a Terrace may be varied as 

 the natural situation of the place may require. 



In respect to form, they should always be 

 broader at the base than the top, and extend 

 lengthways to any distance required; having the 

 sides regularly sloped, of more or less acclivi- 

 ty, as the width, height, and situation admit. 

 Sometimes both sides are sloped, and sometimes 

 only one side, the other perpendicular, and 

 faced with a substantial wall, &c. or formed 

 against the side of a hill, or some naturally* 

 rising ground ; being finished always broad 

 enough at top to admit of a proper walk. In 

 some naturally-elevated situations, Terraces are 

 sometimes formed one above another in two or 

 more ranges, each having its separate side slopes, 

 and elevated walk ; in all of which the slopes are 

 to be neatly laid with grass, and the walk at top 

 occasionally of grass or gravel. 



The entrances leading to Terrace-walks were 

 formerly sometimes formed by an easy acclivity 

 of a grass or gravelled slope, and sometimes by a 

 grand flight of stone steps. 



Where a rising ground, of considerable ele- 

 vation, naturally presents itself in a proper situ- 

 ation, it is an eligible opportunity for forming 

 a Terrace with the least expense and trouble, 

 on account of its not requiring the addition of 

 so much earth and rubbish as when raised en- 

 tirely on a perfect level, wholly of made earth. 

 Where there are any excavations of ground in- 

 tended to form ha-has, pieces of water, &c. 

 the excavated earth may be employed in forming 

 Terraces, Sec. 



In the forming of a Terrace, the base must 

 be staked out wider than the intended width at 

 top for the walk, in order to admit of the ascent 

 of slopes being moderate. And the whole of 



the made earth and rubbish n'.u>t be well rammed 

 and rolled down from tune lo lime BS it is BO 

 plied, in order to render the whole equally 

 firm, that it may not settle irregularly alter 

 being finished. The slopes may ether o 

 with turf, or sown with era — dsj but the 

 first is much the best method when ii can be 

 employed. See Grass-Grodno. 



'I ETRAGONIA, a genus containing plants 

 of the shrubby and herbaceous succulent" peren- 

 nial kinds. 



It belongs to the class and order Icosmdria 

 Pemtugynia, and tanks in the natural ordei ol 

 Sitccii/e'iUe. 



The characters are: that the calyx is a four- 

 lcaved perianth, superior: leaflets four, ovate, 

 bent down anil flat, rolled back at the ed«e, 

 coloured, permanent : there is no corolla, unless 

 the calyx be called so : the stamina have twenty 

 filaments, capillary, shorter than the calyx : 

 anthers oblong, incumbent: the pis till um is a 

 roundish germ, five-cornered, inferior : styles 

 four, awl-shaped, recurved, letujth of 'the 

 stamens : stigma longitudinal of the style, pu- 

 bescent: the pericarpium is a coriaceous drupe, 

 four-cornered with four longitudinal wings; the 

 opposite angles narrower, not opening: the 

 seed one, bony, four-celled : kernels oblong. 



The species cultivated are: 1. T. frvticosa, 

 Shrubby Tetragonia; <2.T. demmbens, Trailing 

 Tetragonia; 3. T. herbacea, Herbaceous Tetra- 

 gonia; 4. T. cchinata, Hedge-hog Tetragonia. 



The first has slender woody stems, rising 

 three or four feet high if supported, otherwise 

 trailing, covered with a light gray bark, and di- 

 viding into a great number of trailing branches, 

 which when young are succulent, ot an herba- 

 ceous colour, and covered with small pellucid 

 drops, which reflect the light, somewhat like 

 the Diamond Ficoidcs : as the branches grow 

 older, they become more woody : the leaves are 

 narrow, thick, succulent, about half an inch 

 long, and a tenth of an inch broad, concave and 

 blunt-pointed; they are placed alternately, and 

 at their base conies out a cluster of smaller 

 leaves, which have the like pellucid drops with 

 the stalks : the flowers axillary, at every joint 

 towards the ends of the branches, solitary, or 

 two or three together. The fruit is an inferior 

 juiceless drupe. 



The second species has larger stalks than the 

 preceding, but they branch out in like manner : 

 the branches trail upon the ground ; the young 

 branches are very succulent, and almost as thick 

 as a man's little finger : the leaves are two inches 

 long, and an inch broad; their surface covered 

 uuli very small pellucid drops, as are also the 

 young branches : flowers larger, upon pretty 

 3N 2 



