of the bed, or the impure nature of the dung. If this be not strictly attended to, the plants will not be brought to that degree of perfection, as might reasonably be expected from a bed in its proper heat and condition.
After the bed has been laid and dealt with according to the foregoing directions, spread two barrows-full of old tan or light mould all over the surface, having it a little deeper in the middle than at the sides. Old tan is certainly more preferable than mould, though either will answer the purpose. Let it be put in the frame the day before the seed is sown, and cover the bed up with a single mat at night, taking care to shut it down until the morning, that the heat may be properly drawn up. Take some forty-eight size pots, and mix a quantity of leaf mould with a sixth proportion of road sand, not sifted fine. The sifting mould to a fine degree is an error too prevalent in horticulture, and ought particularly to be avoided, from its great tendency to bind.
It is very requisi