IS

29

77

'Stony matterFine silicious

And in centesi-mal proportion'

ArgillMild calx

-47

22

31

100

Its retentive power is 82,25: hence I shouldjudge -it to be unfertile in this climate, unlesssituated on a declivity, with an unimpeded fall.It may be called a clayey loam.

Mr. Young discovered a remarkable circum-stance attendant on fertile soils: he found thatequal weights of different soils, being driedand reduced to powder, afforded quantities ofair by distillation somewhat corresponding tothe ratios of their values. This air was a mix-ture of fixed and inflammable airs, both pro-ceeding, most probably, from the decompositionof water by the coaly matter in the soil. Thedistillation should be made from a retort glaz-ed on the outside. He found an ounce of drysoil, value five shillings, produced ten ouncemeasures;