482 On Clay and Marl:[Dees

water, that when it 1s found near the surſace, is universally a wet poachy Soil.

Our marl varies exceedingly in its quality and appearance; or rather perhaps, much ot that which we indiscrimimately call marl, ought to be in reality, referred to a very different class of calcareous Substances. On the east and north east Side of this county, towards the hundreds of Flegg, Blofield, Tun- Stead,&c-. the marl they apply is of a tender greasy nature, nearly white, does not hang to the Shovel like clay, but rattles upon it when it 15 thrown into the cart. It does not come from the pits in Jumps as clay does, but in a more pulverized State from the action of the pick or mattock. It binds a]oose 5011, but is not 50 durable as clay, being repeated at the rate of about ten or twelve four-horse loads per acre, about once in fourteen years. It is eSteemed an immediate manure, as well asrenovator of the oil, and is fetched by land and water carri- age, from a distance of even ſorty miles. It does vot appear that we Soil on wbich it is laid, being vaturally rich and fertile, is at all eloyed with 50 frequent a repetition of this valuable Sub- StanCe.

The north and north west districts also yield a kind of war], which is much esteemed by the farmers in the hundreds of Gal- Jow, North-Greenhoe, Brotbercross, and Smithdop,(where with the exception ot the marsh-land close upon the Sea, the Soil is very muchinferior to that on the east and north-east Sides of the, gqQuuty). as 4 powerful alterative to worn-out Soils. They bave ſound it an invaluable Source of improvement on hew broken-up commons, hbeaths, and 5heep-walks; many thousand aeres of which, a century back, exizted in Norfolk, but have, witbin that period, been juclosed by act ot parliament, and are now in the highest pos»ible State of cultivation. This marl also is of a whitieh hue, tending to yeilow; is drier and harder in its texture than the marl before described, appears +o have much of calcareous, and very little of either 51licious or argillaceous matter in its composition. It flies into a ihousand pieces with a frost, but vever unites again, ot runz together like clay. It effervesces also in vinegar. It is reputed binding, but I scarcely conceive it to be S0. From filty to Sixty Joads per acre, Is not an unusual applica- tion, and will not need repeating during a man's life; but, as is the case witb Jay, the first application ot it 10 new freSh Soils is ſound to be by far the most eflcacious.

To the above valuable contents of the bowels of the earth, may be added also, a Species ot blue clay, SoOmCHWmES used lor we purpose of improvement, but more frequently oi flooring

karns, Ww which 1t 13 exccedivngly wel) adapted--aud pure