There are five essential points in securing the health of houses:—

1. Pure air.

2. Pure water.

3. Efficient drainage.

4. Cleanliness.

5. Light.

Without these, no house can be healthy And it will be unhealthy just in proportion as they are deficient.

1. To have pure air, your house must be so constructed as that the outer atmosphere shall find its way with ease to every corner of it. House architects hardly ever consider this. The object in building a house is to obtain the largest interest for the money, not to save doctor's bills to the tenants. But, if tenants should ever become so wise as to refuse to occupy unhealthily constructed houses, and if Insurance Companies should ever come to understand their interest so thoroughly as to pay a Sanitary Surveyor to look after the houses where their clients live, speculative architects would speedily be brought to their senses. As it is, they build what pays best. And there are always people foolish enough to take the houses they build. And if in the course of time the families die off, as is so often the case, nobody ever thinks of blaming any but Providence for the result. Ill-informed medical men aid in sustaining the delusion, by laying the blame on “current contagions.” Badly constructed houses do for the healthy what badly constructed hospitals do for the sick.