SUPPLEMENT. 



SCIENCE AND ART OF AGRICULTURE. 



131 1 



to be manured : but if there is a proper water cart, this manure may he sprinkled over the land in its 

 liquid state. (See A Dissertation on S, its and Manures.) 



8158. List of hand manures offered lor sale at the present time (July 1843) in London : — 

 Agricultural salt Super-phosphate of lime 

 Agricultural salt, fine Poittevin's disinfected manure 

 Alexander's compost Poittevin's concentrated manure 

 Bleaching powder Rape-dust 



Bone dust, and half-inch bone Rock salt 



Brimstone Saltpetre per cwt. (duty paid) 21s. (id. (Sec Petre, 



Clark's desiccated compost salt.) 



Daniell's Bristol manure Silicate of pot.ish 



Guano, foreign Soda ash 



Guano, Potter's English Sulphate of ammonia 



Gypsum Sulphate of iron 



Humphrey's inodorus soluble compound Sulphate of soda 



Hunt's new fertiliser Sulphur 



Imperial comport Sulphuric acid 



Muriate of ammonia Trimmer's composition for clover 



Muriate of lime Trimmer's composition for wheat, with silicate of 



Nitrate of soda potash 



Petre, salt, 41. per ton (See Saltpetre.) Trimmer's compost for turnips 



Phosnhate of ammonia Urate 



Phosphate of soda Watson's compost for turnips. 



Phosphate of lime In all, thirty-eight sorts ! 



8159. Estimate of tillage manures. " I.iebig," says Professor Johnston, " broadly announced ' tint 

 v. heat grows well in this soil, because it contains much potash, refuses to grow in that, because potash is 

 wanting, and that the efficacv of a fallow consists in its allowing the potash of decaying minerals to ac- 

 cumulate in the soil, and thus to provide a sufficiency for an after crop of corn.' What was this, b it to 

 say that, byadding potash to the soil, vou may grow wheat after wheat for an unknown period ? How 

 important, and yet how simple, a discovery this ! No wonder that it attracted the attention, and ex il ' 

 the hopes, even of the more instructed farmers ; and that a kind of potash monomania should have spread 

 among the distressed agriculturists from one end of the island to the other. Then was the flood-gate 

 opened for new varieties of quackery, and every large town speedily produced its own chemical manure 

 manufactory." 'Q.J. A., vol. i. N. S., p.7.) 



BOOK IV. 



MECHANICAL AGENTS EMPLOYED IN AGRICULTURE. 



Chat, I. — Implements of Manual Labour used in Agriculture, (p. 3G9. ') 



811)0 2444. Lindon's patent spade has the blade case hardened, so as to remain much longer sharp 



than the common spade, which is apt to wear round, get blunt, or become broke. The price is little 

 more than that of the common spade. 



81fil i444. The underfoot spade {fig. 1142.) should be made very strong ; the shaft, or handle, should 



be square, with the angles rounded off, and strongly plated over where it is joined to the cross-angle at 

 top, and to the blade below. The blade is about fourteen inches across, and twelve inches deep ; quite 

 perpendicular, with sharp cutting edges, and a hilt or piece of iron (a) rivetted on for the feet. For the 

 stocking up of hedges, taking the top sods off drains, and various uses where strength is wanted, this 

 spade will be found a most powerful instrument. (Uard. Hag., vol. vii. p. 80.) 



8162 2451. The com rake. (fig. 1143.), for using after the scythe, differs from the common rake both 



in form and dimensions. The head (a) of the corn rakeshould be made of fine ash ; as light as possible, 

 but strong enough to bear the driving in of a number of iron teeth ; and it should be at least live leet in 

 length, and feruled with iron at both ends (6 b). The teeth should be seven inches in length, and lour 

 inches apart, and so curved at their points that the weight of the rake may rest upon the curve, v, ith the 

 points of the teeth quite free of the ground when the rake is held in a working position. I he points o 

 the teeth should be thin and broad. The handle of the rake may be of light hr, and it should be toll 

 six feet in length. An iron (c), passing from the handle on each side to the head, will prevent the latter 



