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Keywords: EQUIANGULAR
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Journal Articles
Minutes of the Proceedings of the Institution of Civil Engineers (1897) 128 (1897): 309–320.
Published: 01 January 1897
...JA PURVES © Thomas Telford and ICE 1897 PRISMS OPTICS LIGHTHOUSES LIGHT REFRACTORS EQUIANGULAR RAYS REFRACTION Papers.] PURYES ON EQUIANGULAR PRISMS. 309 (Paper No. 2969.) (( Equiangular Prisms." By JOHAXRCHIBALPDURVESB,.Sc. THEprimary object in lighthouse optics...
Journal Articles
Minutes of the Proceedings of the Institution of Civil Engineers (1894) 117 (1894): 341–352.
Published: 01 January 1894
...., equiangular lenses, are the best, especially for those lenses remote from the centre of the apparatus, as their form of profile causes less loss of light from divergence ; andthatthe calculation of efficiency based on a spherical flame of thediameter of theburnerwhenapplied t o beams coming from apparatuswith...
