In these kiln-furnaces, ([fig. 8.]) the heat, after passing through the limestone in the kiln or crucible (a), enters the flue (e), and passes through it in the usual manner. The grate on which the fuel burns (d) is contrived to draw out by means of a grooved frame (c), as soon as the lime in the crucible is burned, which then falls into the ash-pit (b), and is removed.
Soil. Alter numerous experiments made with mixtures, of cow, deer, sheep, pigeon, hen, and rotten stable dung, with soot, and other manures, in various proportions, with fresh pasture-soil of different qualities, he says, I can venture to recommend the following:
In the month of April or May, let the sward or turf of a pasture, where the soil is a strong rich loam, and of a reddish colour, be pared off, not more than two inches thick: let it then be carried to the pens in sheep-pastures, where sheep are frequently put for the purpose of dressing, which places should be cleared of stones, &c. and made smooth; then let the turf be laid, with the grass-side downwards, and only one course thick; here it may continue two, three, or more months, during which time it should be turned with a spade once or twice, according as the pen is more or less frequented by the above animals; who, with their urine and dung, will enrich the turf to a great degree, and their feet will reduce it, and prevent any weeds from growing.
After the turf has lain a sufficient time, it should be brought to a convenient place, and laid in a heap for at least six months, (if a twelvemonth it will be the better,) being frequently turned during that time; and after being made pretty fine with a spade, but not screened, it will be fit for use.
In places where the above mode cannot be adopted, the mixture may be made by putting a quantity of sheep’s dung (or deer’s dung, if it can be got) and turf together. But here it must be observed, that the dung should be collected from the pastures when newly fallen; also, that a larger proportion should be added, making an allowance for the want of urine.
1. Three wheelbarrows of the above reduced sward or soil; one barrow of vegetable mould from decayed oak-leaves, or leaves of other deciduous trees, and half a barrow of coarse sand, make a compost-mould for Crowns, Suckers, and Young Plants.
2. Three wheelbarrows of swarth, reduced as above, two barrows of vegetable mould, one barrow of coarse sand, and one-fourth of a barrow of soot, make a compost-mould for fruiting plants.
The above composts should be made some months before they are wanted, and very frequently turned during that time, that the different mixtures may get well and uniformly incorporated.
It is observable, that in hot-houses, where Pine-plants are put in a light soil, the young plants frequently go into fruit the first season, and are then what gardeners term runners; on the contrary, where plants are put in a strong rich soil, they will continue to grow, and not fruit even at a proper season: therefore, from the nature of the soil from whence the sward was taken, the quantity of sand used must be proportioned; when the loam is not strong, sand will be unnecessary in the compost for young plants.