st, would endanger the health of the people of the city. To meet and provide for this condition of affairs was the object of the statute.
■ It provides, in the first place, that whenever it shall be certified to the board of health- that any building is infected with contagious diseases, or, by reason of want of repair, has become dangerous to life, or is unfit for human habitation, because of defects in drainage, plumbing, ventilation or the construction of the same, or because of the existence of a nuisance on the premises, and which is likely to cause sickness among its occupants, the board of health might, in a manner prescribed in the statute, require all persons to vacate the buildings. The statute provided for notice of the order to be given to the occupants of the building and to its owner or his agent, and it contained a further provision that, whenever the defects mentioned in the' order shall be remedied or the danger shall cease to exist, the board of health might revoke the order. The statute further pi'ovided that “ whenever, in the opinion of the board of health of the health department of the city of New York, any building, or part thereof, in the city of New York, an order to vacate which has been made by said board, is, by reason of age, defects in drainage, plumbing, infection with contagious disease or ventilation, or because of the existence of a nuisance on the premises which is likely to cause sickness, * "x" * or because it stops ventilation in other buildings, or otherwise makes, or conduces to make, other buildings adjacent to the same unfit for human habitation or dangerous or injurious to health, or because' it ■ prevents proper measures from being carried into effect for remedying any nuisance injurious to health or other sanitary evils in r