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  1. Except, of course, when the brightness of the pedestrian is so low that it may be considered zero. See Moon and Hunt, "Reflection Characteristics of Road Surfaces," J.F.I. 225, 1 (1938).
  2. A. C. Hardy, "A New Recording Spectrophotometer," J.O.S.A. 25, 305 (1935). Without the help of such instruments,the present investigation would have been hardly feasible. We wish to thank Messrs. S. Q. Duntley and N. F. Barnes, who obtained the reflection-factor curves, and Messrs. M. H. Borg, and J. J. Renner, who were of assistance in the latter part of the work. We also wish to acknowledge the help of the Cornwall Mills, Inc., and Charles Adler and Son, who donated some of the clothing samples.
  3. For C2= 14,320 micron degrees.
  4. Barnes and Forsythe, "Characteristics of Some New Mercury Arc Lamps," J.O.S.A. 27, 83 (1937).
  5. G. B. van de Werfhorst, "Technical Considerations in the Lighting of Country Roads," Philips Tech. Rev. 2, 239 (1937).
  6. A. C. Hardy, Handbook of Colorimetry (Cambridge,Mass., 1936). Parry Moon, Scientific Basis of Illuminating Engineering (New York, 1936), Chapter XIII.

1938 (1)

Except, of course, when the brightness of the pedestrian is so low that it may be considered zero. See Moon and Hunt, "Reflection Characteristics of Road Surfaces," J.F.I. 225, 1 (1938).

1937 (2)

Barnes and Forsythe, "Characteristics of Some New Mercury Arc Lamps," J.O.S.A. 27, 83 (1937).

G. B. van de Werfhorst, "Technical Considerations in the Lighting of Country Roads," Philips Tech. Rev. 2, 239 (1937).

1935 (1)

A. C. Hardy, "A New Recording Spectrophotometer," J.O.S.A. 25, 305 (1935). Without the help of such instruments,the present investigation would have been hardly feasible. We wish to thank Messrs. S. Q. Duntley and N. F. Barnes, who obtained the reflection-factor curves, and Messrs. M. H. Borg, and J. J. Renner, who were of assistance in the latter part of the work. We also wish to acknowledge the help of the Cornwall Mills, Inc., and Charles Adler and Son, who donated some of the clothing samples.

Hardy, A. C.

A. C. Hardy, "A New Recording Spectrophotometer," J.O.S.A. 25, 305 (1935). Without the help of such instruments,the present investigation would have been hardly feasible. We wish to thank Messrs. S. Q. Duntley and N. F. Barnes, who obtained the reflection-factor curves, and Messrs. M. H. Borg, and J. J. Renner, who were of assistance in the latter part of the work. We also wish to acknowledge the help of the Cornwall Mills, Inc., and Charles Adler and Son, who donated some of the clothing samples.

A. C. Hardy, Handbook of Colorimetry (Cambridge,Mass., 1936). Parry Moon, Scientific Basis of Illuminating Engineering (New York, 1936), Chapter XIII.

van de Werfhorst, G. B.

G. B. van de Werfhorst, "Technical Considerations in the Lighting of Country Roads," Philips Tech. Rev. 2, 239 (1937).

J.F.I. (1)

Except, of course, when the brightness of the pedestrian is so low that it may be considered zero. See Moon and Hunt, "Reflection Characteristics of Road Surfaces," J.F.I. 225, 1 (1938).

J.O.S.A. (2)

A. C. Hardy, "A New Recording Spectrophotometer," J.O.S.A. 25, 305 (1935). Without the help of such instruments,the present investigation would have been hardly feasible. We wish to thank Messrs. S. Q. Duntley and N. F. Barnes, who obtained the reflection-factor curves, and Messrs. M. H. Borg, and J. J. Renner, who were of assistance in the latter part of the work. We also wish to acknowledge the help of the Cornwall Mills, Inc., and Charles Adler and Son, who donated some of the clothing samples.

Barnes and Forsythe, "Characteristics of Some New Mercury Arc Lamps," J.O.S.A. 27, 83 (1937).

Philips Tech. Rev. (1)

G. B. van de Werfhorst, "Technical Considerations in the Lighting of Country Roads," Philips Tech. Rev. 2, 239 (1937).

Other (2)

A. C. Hardy, Handbook of Colorimetry (Cambridge,Mass., 1936). Parry Moon, Scientific Basis of Illuminating Engineering (New York, 1936), Chapter XIII.

For C2= 14,320 micron degrees.

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