and ventilation.
Machine safeguarding is a subject all of itself. We do not consider any machine—no matter how efficiently it may turn out its work—as a proper machine unless it is absolutely safe. We have no machines that we consider unsafe, but even at that a few accidents will happen. Every accident, no matter how trivial, is traced back by a skilled man employed solely for that purpose, and a study is made of the machine to make that same accident in the future impossible.
When we put up the older buildings, we did not understand so much about ventilation as we do to-day. In all the later buildings, the supporting columns are made hollow and through them the bad air is pumped out and the good air introduced. A nearly even temperature is kept everywhere the year round and, during daylight, there is nowhere the necessity for artificial light. Something like seven hundred men are detailed exclusively to keeping the shops clean, the windows washed, and all of the paint fresh. The dark corners which invite expectoration are painted white. One cannot have morale without cleanliness. We tolerate makeshift cleanliness no more than makeshift methods.