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Alvan Clark animals appear auks become believe birds body Carlyle Carlyle's cause cent cephalopods Christianity Collége de France common dead-work depositors deposits Diagram diameter diffraction disks discovery earth ence England evolution existence experience eye-piece fact focal length focus Government Herbert Spencer human hypothesis idea inch insects intellectual interest knowledge labor large numbers larval lens less light light-waves magnifying power Max Müller ment Metaphysical Society mind monotheism myths natural selection nest object object-glass observed organic origin peculiarities phenomena philosophical physical PLACER MINES planet postal savings-banks present principle produced Professor Hyatt progress question refracting telescope religions religious remarkable retina savings scientific seems solar solar system species spherical stage star structure surface teachers telescope theory things Thomasville tion Transcendentalist true truth uniformity of Nature vibrating molecule wave-fronts waves York