Mexico and the United States; a study of subjects affecting their political, commercial, and social relations, made with a view to their promotion: . teuunx ^ ^. oo X uj Ll. o >^ 2 s*H ^ ^ —J UJ <C< C/D o uJ < = X 2: <o tz CD Z < orQ 0 , ,18 H| ^ t^ fo w i J \ ^ XTbe lDalle\? ot ^e^lcos Drainage. 277 feet from each other. These served to ventilate the tunnel and tofacilitate the work. The deepest of these shafts, situated on the saddleof Acatlan, has a depth of 92 metres, or 301 feet 9 inches; the shallow-est is 21 metres, or 68 feet 10 inches. To give an idea of the labor in
Mexico and the United States; a study of subjects affecting their political, commercial, and social relations, made with a view to their promotion: . teuunx ^ ^. oo X uj Ll. o >^ 2 s*H ^ ^ —J UJ <C< C/D o uJ < = X 2: <o tz CD Z < orQ 0 , ,18 H| ^ t^ fo w i J \ ^ XTbe lDalle\? ot ^e^lcos Drainage. 277 feet from each other. These served to ventilate the tunnel and tofacilitate the work. The deepest of these shafts, situated on the saddleof Acatlan, has a depth of 92 metres, or 301 feet 9 inches; the shallow-est is 21 metres, or 68 feet 10 inches. To give an idea of the labor involved beyond the mere tunneling,it is as well to mention that the quantity of materials required per linealyard of tunnel was 1800 bricks, 94 cement blocks, 3 cubic yards ofmortar, and 70 cubic feet of volcanic stone. Maximum discharge through the tunnel = 18 cubic metres, 635!cubic feet per second. When the drainage board took charge of the work, it was executedby day labor both in the canal and in the tunnel, the latter having thelarger amounts expended on it. But, shortly afterwards, the contractfor the tunnel was let to M
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyorkandlondongp
