Note 35 — VI.—EVIDENCE OF THE EFFECTS OF PREVENTIVE MEASURES IN RAISING THE STANDARD OF HEALTH AND THE CHANCES OF LIFE.
Reading edition
Vide Appendix for estimate and detailed specification. From some recent experiments made with the egg-shaped sewers or main drains, it appears that drains of sufficient size might be made at one-third less than the price for sewers in the annexed estimate. In many instances, main drains costing one-half the sum would suffice.