it was to the fact that they are seldom cleaned. and apply the paste to the inner faceof one of the found that when they excluded air and other gases layers of paper as the paper passes from the tension from the water no action took place, and asecond con- clusion was that water alone would not… … readily pasted in with the paper when so really set up the rust action, and when it was desired, or one or both of the last adding formed, the carbonic acid was liberated and attacked the layers beneath. That was why rust had rolls may carry a tinted paper with which to form the water for heating…
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