Construction and, Superstructure 331 
and the most durable, and if well laid and com- 
posed of the best materials, are entirely satisfactory. 
But wooden floors, tightly laid upon a well-drained 
foundation, are fairly durable, and when out of re- 
pair may be easily replaced at comparatively small 
cost. Whatever the floors, they must be thor- 
oughly sewered. The floor should slant rapidly 
to the gutter, so that all water -will quickly run 
off through a thoroughly trapped iron pipe until the 
outside of the building is reached, after which 
well-glazed sewer pipe may be used. An abundant 
supply of pure water is indispensable. This, under 
ordinary conditions, will be obtained from a_ well. 
A bored or driven well is less liable to contami- 
nation than an open dug well, but in any event 
the site of the well should be chosen with due 
regard to possible sources of contamination. If 
the water is very abundant and at a temperature 
below 48°, a supply of ice is not indispensable, 
except. for cold storage purposes, but it will be 
found in most cases to be of great advantage. 
In any event, the means of readily securing and 
maintaining in the cream a temperature of 50° F. 
or below is indispensable. Water and steam pipes 
should be carried to all parts of the building where 
their presence may be of advantage for cleaning 
purposes. 
The superstructure may be as eelaborate or as 
simple as desired. At the least, it should offer as 
good protection from the elements as a well-built 
house does. In fact, the construction need not 
