Decembek 1, 1922] 



SCIENCE 



637 



Combination of Journal -witii Instrument 

 Makers' Journal: J. P. C. Southall, chairman 



Waj-s and means of preparing and publisMng 

 an Englisli translation of Helmholtz's "Physi- 

 ologic Optics": J. P. C. Southall, chairman. 



Brief oral reports were made by the follow- 

 ing pix)gress committees (committees on nomen- 

 clature and standards) : 



Refleetometry : A. H. Taylor. 



Spectroradiometry : W. W. Coblentz. 



Visual refraction : A. Ames, Jr. 



Wave-lengths: W. F. Meggers. 



Photometry and illumination: E. C. Crittenden. 



Optical glass: G. W. Morey. 



Photographic materials: E. Davis. 



Projection: L. A. Jones. 



Pyrometry: C. O. Pairchild. 



Eef ractometry : I. C. Gardner. 



Spectrophotometry: K. S. Gibson. 

 2. Special Papers 



The following papers were given by special 

 invitation : 



Apparatus and results of solar radiation worJc: 

 C. G. Abbot, Smithsonian Institution. 



Thermocouple measurements of stellar and 

 planetary radiation: "W. W. Coblentz, Bureau of 

 Standards. 



The optics of the atmosphere : W. J. Hum- 

 PHEETS, U. S. Weather Bureau. 



Photic orientation in organisms : S. 0. Mast, 

 Johns Hopkins University. 



Electrical response of the retina to stimulation 

 hy light: E. L. Chaffee and W. T. Bovie, Har- 

 vard University. 



On reflex visual sensations: Frank Allen, Uni- 

 versity of Manitoba. 



3. Contributed Papers 



The following are the titles of papers offered 

 ■by members and others, and actually presented 

 at this meeting: 



Beflection of ^dtra-violet by flowers: F. K. 

 EiCHTMTEK, Cornell University. 



Some unusual halos: W. J. Htjmpheeys, U. S. 

 Weather Bureau. 



The excitation of spark spectra of rubidium 

 and ocBsium in a low voltage arc: F. L. Mohlee, 

 Paul D. Foote, A. E. Etiabk and' C. C. Kless, 

 Bureau of Standards. 



Some observations on the transformation of 

 thermal radiant energy into electric current in 

 molybdenite: W. W. Coblentz, Bureau of Stand- 

 ards. 



Extraordinary diffraction of X-rays: L. W. 

 McKeehan, Bell System Laboratories. 



Simple equipment for detecting the errors of 

 screws: Wilmee Soudee, Bureau of Standards. 



Refraction of a thin pencil by any refracting 

 surface; generalized meridional and sagittal for- 

 mulas: E. D. EoE, Jr., Syracuse University. 



The dioptrometer, an apparatus for measuring 

 the power of the commercial lenses: Henet F. 

 KUETZ, Bausch & Lomb. 



The measurement and specification of optical 

 characteristics in projector performance: G. W. 

 MoPFiTT, Frankford Arsenal. 



The practical application of parabolic surfaces 

 in lens construction: W. B. Eayton, Bausch & 

 Ijomb. 



Some recent contributions to psycho-physio- 

 logical optics: L. T. Troland, Harvard Univer- 

 sity. 



A photo-electric theory of color vision: Janet 

 Howell Clark, Johns Hopkins University. 



A theory of color vision: Elliot Q. Adams, 

 Nela Eesearch Laboratory. 



The fundamental facts of color-sensation, being 

 the minimal requirements of a color sensation 

 theory, with illustrations in color: Christine 

 Ladd-Peanklin, Columbia University. 



The visibility of radiant ' energy : K. S. Gibson 

 and E. P. T. Tyndall, Nela Eesearch Laborato- 

 ries, Bureau of Standards. 



On the luminosity ratios of the spectral com- 

 plementaries, and the subjective saturation of 

 the spectrum: E. H. Sinden, Johns Hopkins Uni- 

 versity. 



Further studies of the Abney effect: L. T. Teo- 

 LAND and C. H. Langford, Harvard University. 



A critical study of the Snellen letters and the 

 "illiterate" E tests for the acuteness of vision 

 of school children, and a proposed substitute for 

 these tests: J. M. McCallie, Board of Education, 

 Trenton, N. J. 



A comparison of the Fechner and Munsell 

 scales of luminous sensation value: Elliot Q. 

 Abams, Nela Eesearch Laboratories. 



The theory of flicker photometry: C. E. 

 Feeree, Bryn Mawr. 



Comparative studies of equality of brightness 

 and flicker photometry with special reference to 

 the lag of visual sensation: Gertrude Eand, 

 Bryn Mawr. 



Progress on the determination of normal gray 

 light: Irwin G. Peiest, Bureau of Standards, 

 Munsell Color Company. 



The effect of various conditions upon the deter- 

 mination of the normal stimulus of gray : Irwin 

 G. Peiest and Caspee L. Cottrell, Munsell 

 Color Company, Bureau of Standards. 



