DRAINAGE WATER. 



atmosphere. The imbibing power of plants, the motion of the 

 sap in them, is dependent upon exhalation ; the quantity of food 

 imbibed and needed for the functions of the plant, is proportionate 

 to the quantity of moisture exhaled in a given time. If the plant 

 has imbibed a maximum of fluid, and the exhalation is hindered by 

 a low temperature, or by long continued wet weather, the supply 

 of food or the nutrition of the plant stops, the sap stagnates, and 

 an alteration ensues tending to the generation of parasitical mi- 

 croscopic growths. If rain falls after hot weather, followed by a 

 strong heat without wind, and every part of the plant is surround- 

 ed with an atmosphere saturated with moisture, cooling by further 

 exhalation ceases, and the plants succumb to the sun-blasts. 



APPENDIX D (page 98). 



ANALYSES OF DRAINAGE, LTSIMETER, RIVER AND MARSH 



WATER. 



I. Drainage Water. 



Thomas Way found in drainage water taken from seven differ- 

 ent fields, the following constituents (' Journal of the Roy. Agric. 

 Soc.,' vol. xvii. 133) : 



Grains in 1 gallon = 10,000 grains of water. 



Very similar results were obtained by Dr. Krocker in his analy- 

 ses of drainage water from Proskau. (See Liebig and Kopp's 

 ' Jahresbericht ' for 1853, page 742.) 



