Distributing Gas at High Pressure........G. F. Goodnow....

... 555

556

To what extent does the P. & A. tar

extractor assist in causing the deposition of naphthalene, and what kind of an extractor would

be recommended as a substitute? ...R. Norris......

W. E. Steinwedell

J. M. Berkley......

547 .547, 548 .547, 548