Ontario Sessional Papers, 1903, . anyone caring to make the experiment,as I have done, that such a t3nk at the end of a year has not had a- total de-posit of solid matter, greater than can be held in a half-bushel measure. IfSthe balance, then, after decomposition, is capa-ble of being carried along withthe 200 gallons of water daily, it is clear that nearly all of it is capable, likeany other soiuble material, of soaking away into the soil with the water, ifthe conditions are fa-vorable. I have had drawn up for your inspection the diagram of a tank, whichis intended to deal with such
Ontario Sessional Papers, 1903, . anyone caring to make the experiment,as I have done, that such a t3nk at the end of a year has not had a- total de-posit of solid matter, greater than can be held in a half-bushel measure. IfSthe balance, then, after decomposition, is capa-ble of being carried along withthe 200 gallons of water daily, it is clear that nearly all of it is capable, likeany other soiuble material, of soaking away into the soil with the water, ifthe conditions are fa-vorable. I have had drawn up for your inspection the diagram of a tank, whichis intended to deal with such materials in a way to give the organic matter anopportunity to decompose, the water carrying the soluble materials being 1902 BOARD OF HEALTH. 143 removed from the decomposing tank,, which we may call the septictank—the word septic meaning putrid or decomposing—to a second tank,whence it may be discharged by a simple apparatus, at such intervals as may [v\\s^^N^\v\vi I nTTnTTTrmg::?^\Nx\\\v-^ 11111: i i i 11111 li^^^^^^^w^. be found practical to produce the best results. The question then arise*:In what manner can we dispose of this organic matter in solution, conveni-ently and in such a way as will not create a surface nuisance, or a pollutionof ground water? Let us assume that by a series of sub-surface tiles, laid in« proper manner, we can distribute the 200 gallons over an equal numberof feet of surface. It is plain that each square foot would receive 1 gallonof water daily. As soils vary in their capacity for water, from a coarse sandwhich will bold in its interstices not more than 25 per cent, of its volume ofwater, to a tenacious clay, which holds 75 per cent, of its own volume ofwater, it is apparent that if one gallon of water were poured on the surfaceof a eu)ic foot of dry soil, there would not be any water leaking a-way fromthe bottom of even a coarse sand, since a cubic foot of water equals ; so that it requires VA gallons to be poured o
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