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Report of Standards and Nomenclature Committee 47
isfied with the recomineiidatioiis. I will ask Mv. Jones to read the proposition again.
(Definition repeated again)
(Adoption moved, seconded, and carried)
Mr. Jones will read the sixth recommendation.
Dr. Mees: This particular definition was asked for at the International Congress. Ours will be only one of the different national recommendations^ and it is a little unfortunate that it has been necessary to draft it in accordance with the recommendations of the underwriters' Laboratories, because the conditions of test will be different in each country. I shall support it as it is, but I think a new set of recommendations will have to be adopted for the test so that it will be in accord with other people's recommendations. I think for the moment we should adopt this definition.
Mr. Ross : I don 't remember that any mention of surrounding temperature was made. Is that important]
Mr. Joxes: It isn't important; it is ver^' insensitive to temperature.
Mr. Hubbard: There is no mention of the age of the film, which is quite a factor.
Mr. Jones : As a matter of fact there are many factors which might be mentioned as having some influence on the burning time. We are trying now to establish some value which will distinguish between a film we wish to call Safety and one non-safety. Of the materials ordinarily referred to as safety film none have a burning time less than 20 seconds, while the nitrate film has a burning time of approximately 4 seconds. There is a very wide gap between the two. The influence of various factors, such as temperature, age, etc. is undoubtedly of a different order than the difference in burning time between the nitrate and the most rapidly burning safety film. It will be remembered that this definition cannot be formulated wdth the precision of that relating to the international meter. If w^e should attempt to take into account all possible factors that may influence burning time the definition would become so hedged around with qualifications as to be extremely complicated and difficult of interpretation. We feel that the definition proposed is a reasonable one.
President Porter : I will ask 'Mv. Jones to read the recommendation once more.
(Adoption moved, seconded, and passed.)
That concludes the report of the Standards and Nomenclature Committee.
(Applause) It shows they have been doing a tremendous amount of work.