On the Composition of Waters of Land-Drainage. 



155 



V^ATKIIS COLLECTED ApRIL 21sT, 1868. 

 [FlKliEXTLY MANURED, COLLECTED ApRIL 21sT, 1868. 



rery year, commencing 1844. 



I Draiuage-Waters iu Grains jjer Gallon. 



