Well-equipped Water-sterilization Trailer

A Nimportant part in sanitary engineering is played by mobile chlorinating apparatu - s. By its means any temporary supply of drinking water can be sterilized on the spot,......

Did S.t.r. Do Wrong?

I AM afraid that I gave an inquirer the wrong advice on a recent occasion. Or did I? I would like to know, and I am asking readers to give me their opinions. The inquiry related......