VOLUMES ONE TO SIXTEEN. 



29 



DRAINAGE. 



action of water, 120 ; a soil perfectly 

 dry and perfectly wet alike sterile, «6. ; 

 1 inch depth of rain is equal to 1 ton 

 per acre, 122 ; water a powerful radiator 

 of heat, 123 ; rain-watercarries heat into 

 a soil, 124; drains, depth of, */'. ; covered, 

 %'). ; soils absorb moisture, the extent of 

 the absorption, \-2C> ; Professor Leslie's 

 trials on, ih. ; absorption and retention 



: of heat by soils, Davy on, 127-129; 

 cause and physical action of dew, 130 ; 

 hoar-frost is frozen dew, 131 ; drainage, 

 effect of, on the entrance and exchange 

 of air, 132 ; the amount of dew pre- 

 cipitated varies with the soil and the 

 leaves of different plants, i'). ; soils 

 difference of their attraction for dew, 

 ih. ; sands are powerful attractors, ib. ■ 

 the atmosphere near rivers, and of the 

 uplands, 133 ; the action of the leaves 

 of different plants on dew, ih. ; modes 

 of retaining dew by different plants, 

 i6. ; as to moonshiny or clear and 

 dewy nights advancing putrefaction, 

 135; the covering of plants to protect 

 them from cold explained, ib. ; the 

 passage of sheep over dover covered 

 with hoar-frost, 136 ; experiments on 

 the temperature of soils, 137 ; by 

 establishing a free passage for water 

 through the soil, i>>. ; Schubler's ex- 

 periments at Tubingen and Geneva, 

 138 ; Leslie's experiments, 139 ; Mr. 

 Parkes' own experiments at Kedraoss 

 near Bolton, 14U; thermometers in it 

 at different depths, 140, 141 ; result of 

 observations, 1 42 ; facts to be ascertained 

 by experiment, 145 ; on the quantity of 

 rain compared with the quantity of 

 ■water evaporated from or filtered 

 through a soil, with some remarks on 

 drainage, 140; the register kept by 

 Mr. John Dickinson of Abbot's Hill in 

 Hertfordshire, 140 ; the portion of rain 

 which filters through the soil, 14S; 

 that which falls from October to March, 

 149 ; when the soil is in its driest state, 

 i'j. • the mean excess of rain-water to 

 be disposed of during the six coldest 

 months, ih. ; depth of rain which fell 

 monthly during 1836 to 1843, 150 ; 

 table of rain which fell in those 8 

 years, in inches and tons per acre, 151 ; 

 amount of a very heavy rain, 153; 

 running of a deep and a'siiallower 

 drain, 154 ; Mr. Hammond's practice 

 in draining stitf clay, 150; the mean 

 annual rain in London, 157. 



Drainauk, Sir J. (iraham on the fre- 

 quent drain system, i. 29. 



, report of several operations in 



DRAINAGE. 



thorough-draining and subsoil-plough- 

 ing at Oakley Park, by Mr. K. White, 

 33, 248. 



Dkainage, on the mode of making and 

 using tiles on the Stow Hall estate in 

 Norfolk, described by J.Wiggins, i. 350. 



, stoppage of drains by the roots of 



plants and trees, i. 364. 



in Nottinghamshire, vi. 30. 



, on reducing the cost of permanent 



drainage, by Josiah Parkes, vi. 125. 



, on deep draining, by the Right 



Hon. C. Arbuthnot, vi. 129. 



system of Cornwall (Karkeek), vi. 



421. 



, deep, the theory of, by J. C. Clut- 



terbuck, vi. 489. 



, on deep, by Right Hon. C. Arbuth- 

 not, vi. 573. 



, on the best method of draining 



running sands, by W'. Linton, a prize 

 essay, vii. 115. 



, by task-work, how paid for, by 



H. Raynbird, vii. 131. 



, on draining, by J. Parkes, vii. 249 j, 



W^ Bligh's work ' The English Im- 

 prover Improved,' 252 ; deposit in 

 draining-pipe at Drayton Manor, 261 ; 

 depth to which worms penetrate, 266 ; 

 the quantitj' of salt in the soil in which 

 wheat will vegetate, 208 ; on air-drains, 

 209 ; the use of cesspools in, 270. 



, on cheapness of, by P. Pusey, vii. 



520. 



in Suffolk, by H. Raynbird, viii. 



278 ; its extent and antiquity in Suffolk, 

 3U9. 



, pastures liable to be burnt up im- 

 proved by draining, by R. Smith, ix. 11. 



, on the failure of deep draining on 



certain strong clay subsoils, and the 

 injurious effects of sinking the water 

 too far below the roots of plants in very 

 porous, alluvial, and peatv soils, by 

 W. R. Webster, ix. 237. 



, practical experiments on the air- 

 drainage of land, by S. Hutchinson, ix, 

 340. 



, on draining with fir-boughs, by 



Lord Portuian, ix. 453. 



in Devonshire (Tanner), ix. 470. 



, sandy lands in the N. R. of York- 

 shire (Milburn), ix. 509. 



, a dress for drainers, by the Marquis 



of Westminster, x. 51. 



, on the stoppage of drains by an 



earthy deposit, by Lord I'ortman, x. 

 119; analysis of deposit, bv J. T. Way, 

 121. 



, an improved drain level described, 



by T. Cooke, x. 165. 



