Page:United States Statutes at Large Volume 49 Part 2.djvu/617

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TELECOMMUNICATION CONVENTION. DECEMBER 9, 1932. APPENDIX 10 Scale Used to Express Strength of Signals (See article 16) 1 = scarcely perceptible; unreadable. 2 = weak; readable now and then. a= fairly good; readable, but with difficulty. 4 = good; readable. 5 = very good; perfectly readable. Appendix 10. Scale to express strength of signals. Ante, p. 2501.