International review of the science and practice of agriculture . ed a greater power for decomposing cel-lulose than their corresponding subsoils, the difference being very smallin the case of waste land and much larger for cultivated land. Cultivated,limed or manured surface soil was also much more active than waste sur-face soil. As with ammonification and nitrification, maximum decom-position of cellulose occured when the soil had previously received adressing of dung. 5) In no sample was Azotobader present. Surface soils and cultiv-ated soils fermented mannite more readily than subsoils an
International review of the science and practice of agriculture . ed a greater power for decomposing cel-lulose than their corresponding subsoils, the difference being very smallin the case of waste land and much larger for cultivated land. Cultivated,limed or manured surface soil was also much more active than waste sur-face soil. As with ammonification and nitrification, maximum decom-position of cellulose occured when the soil had previously received adressing of dung. 5) In no sample was Azotobader present. Surface soils and cultiv-ated soils fermented mannite more readily than subsoils and waste soils,tha maximum effect being again obtained with the dunged plot. 1259 - Reclaiming the Everglades of Florida. — \\.,in Sdenti/ic American, VoL CXV, No. 12, pp. 258-259. New-York, September i6, 1916. In the south of Florida there are some 4 million acres of swamp knownas the Everglades which are being converted into agricultural land bydrainage. iVn aircurate topographical survey of the district had shown that OPENING UP LAND FORCULTIVATION. Machine used for idgging trenches and pulverisini; the soil. 1746 METHODS OF SOIL CULTIVATION the swampy condition of the area was due to the Okeechopee lake and thatas the rim of the lake was some 20 ft. above the level of the tidal river, thereclamation could be effected by merely cutting canals through the rockrim of the lake and allowing the water to flow away by force of first reclamation project which has already been carried into effectincluded the excavation of 4 canals of a total length of 200 miles and of anaverage cross section of 5 X 60 ft.; 6 dredges were employed for the the making of the smaller ditches other machines were used. One ofthese is illustrated iu the adjoining fig.; it not only dug trenches but pul-verised the soil at the same time, moving across the land at the rate of 500ft. in 10 hours. Another ditcher used was capable of cutting a trench 400 6 ft. deep and 3
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