the T^j; to y^Vtf "f 3, millimeter in thick- highest honors. ^^^iA I !li!ll!llllllin I ': ness, and irom these sheets strips In 1867 Dr. Langley was called to one millimeter wide and one centi- the charge of the Allegheny Obser- meter long, or less, are cut. These INFRA-RES SPECTRUM OF A ROCK SALT… … a degree can, I believe, be thus THE ASTBO-FHYSICAL OBSERVATORY OF THE SMITHSONIAN INSTITUTION, the extraordinary sun spots. noted;" and it is evident from Four years later, in discussing WASHINGTON. D 0 11901 SCIENTIFIC AMERICAN, INC.
Distance · Feet · Tons · Scientific American · Bolometer · Indicated horse · Armored cruisers · Horse power · Long distance · Gas engine · Insulating piece · Steam engine · Water tube · American supplement
Internet Archive · Public domain (published before 1931). Free to use for anything.
