ARC-EN-GIEL BLANC

i-jûû. Langwith, Concerning ihe Ap{)areances of several Arches of Colourn (iOntigiions to the Inner Edge of the Common Rainliow. Pltil.

&32 LUMIÈRE NON POLARISÉE.

Trans, abr., VI, 698. (Premières observations des arcs surmunt^

raires.) i7a<i. Pembbrton, Od the Above Appearance in the Rainbow. Pkii TV.

ahr., VI, 69a. (Essai d explication au moyen des accès.) 180&. YouNG, Experiments and Gaiciilations Relative to Physical Optics. —

Application to the Supemumerary Rainbows, PhiL Tr., \%oh,

1 836. PoTTBR , Mathematical Considérations on the Prohlem of the Rainbow.

Trans. ofthe Soe, of Cambr,^ VI, lAi.

i836. AiRY, Intensity of Light in the Neighboiirhood ofa Caustic, Tranê, of

the Soc. ofCambr., VI, 379.

1887. Babinbt, Mémoires d'optique météorologique, C. R., IV, 638. 18&0. QuET, Sur les arcs-en-ciel supplémentaires, C. /?., XI, a45. 18^9. Miller, On Spurious Rainbows, Trantt. ofthe Soc. of Cambr., VII.