TEE 



[791] 



TKi 



of wire keeps it from swinging and sway 

 ing backwards and forwards. 



Umbrella Trellis is a form excellently 

 adapted for Wista'ria Sine'itsis,a,nd. other 

 climbers or shrubs liaving long racemes 

 'of flowers. 



Hothouse Trellis, for training vines 

 near the glass, is usually made of thin 

 rods of deal or of iron, placed about a foot 

 apart, and fastened to the framework of 

 the building. Mr. Long, Beaufort Place, 

 Chelsea, has invented a moveable wire 

 trellis, by which the vines may be lowered 

 from the roof, or placed at any angle, 

 without injuring the vines. This is an 

 excellent mode of removing them from 

 the influence of extreme exterior heat or 

 cold. A still further improvement would 

 be to have the vertical rods moveable 

 round the rod horizontally fixed to the 

 rafter or roof, for then the whole trelllis 

 might be raised to an angle with, or even 

 close to, the glass, whenever sun to the 

 vine upon the trellis, or shade to the 

 plants within the house, was desirable. 



TuEMBLiNa AMERICAN-TREE. Po'pnlns 

 tre'mula. 



TRENCHING is one of the readiest modes 

 in the gardener's power for renovating 

 his soil. The process is thus conducted : 

 From the end of the piece of ground 

 where it is intended to begin take out a 

 trench two spades deep, and twenty inches 

 wide, and wheel the earth to the opposite 

 end to fill up and finish the last ridge. 

 Measure off the width of another trench, 

 then stretch the line, and mark it out with 

 the spade. Proceed in this way until the 

 whole of the ridges are outlined, after 

 which begin at one end, and fill up the 

 bottom of the first trench with the surface 



or "top spit" oi the second one; then 

 take the bottom " spit" of the latter, and 

 throw it in such a way over the other as 

 to form an elevated sharp-pointed ridge. 

 By this means a portion of fresh soil is 

 annually brought on the surface in the 

 place of that which the crop of the past 

 season may have, in some measure, ex- 

 hausted. 



Bastard Trenching is thus performed: 

 Open a trench two feet and a half or 

 a yard wide, one full spit, and the shovel- 

 ling deep, and wheel the soil from it to 

 where it is intended to finish the piece; 

 then put in the dung, and dig it in with 

 the bottom spit in the trench ; then fill 

 up this trench with the top spit, &c., of 

 the second, treating it in like manner, and 

 so on. The advantages of this plan of 

 working the soil are, the good soil is 

 retained at the top, an important con- 

 sideration where the subsoil is poor or 

 bad; the bottom soil is enriched and 

 loosened for the penetration and nourish- 

 ment of the roots, and, allowing them to 

 descend deeper, they are not so liable to 

 suffer from drought in summer; strong 

 soil is rendered capable of absorbing more 

 moisture, and yet remains drier at the 

 surface by the water passing down more 

 rapidly to the subsoil, and it insures a 

 thorough shifting of the soil. 



In ail trenching, whether one, two, or 

 more spades deep, always, previous to 

 digging, put the top of each trench two 

 or three inches deep or more, with all 

 weeds and other litter at the bottom of 

 he open one, which not only makes clean 

 digging and increases the depth of loose 

 oil, but all weeds and their seeds are 

 'egularly buried at such a depth, that the 

 veeds themselves will rot, and their seeds 

 ;annot vegetate. 



TRI'BULUS. Caltrops. (From treis t 

 ;hree, and ballo, to project; carpels, or 

 livisions of the seed-vessel, end in three 

 or four projecting points. Nat. ord., 

 Beancapers [Zygophyllacese]. Linn., 10- 

 Decandria 1- Monoyynia.} 



All yellow-flowered, and animals, except cistoi f - 



des. Sow in a hotbed in March, harden off, and 



ur, in a sheltered place in the garden towards the 



eginning of June, or flower in pots in th green- 



louse; rich, light, sandy loam; a little peat will 



>e required for vistoi'des, which is easily increased 



>v cuttings in the spring. 



T. cistoi'des (cistus-like). 1|. July. S. Amcr. 



1752. Stove evergreen. 

 ii'ximxn ( 'greatest). l June. Jamaica. 1729. 



terr?' stris (earth). I.June. South Rurope. 1596. 



trijugu'tus (three-paired). . June. Georgia* 



1819. 



