About the Book
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908. Excerpt: ... 'Newton: analysis of sunlight, 47; advan-tages of high altitudes. 111. Niuhols: stellar heat, 172. Olmsted: calcium hydride in spots, 163. Origin of Species, 1. Orion Nerula, 44, 188-90; Trapezium stars, 188. 190. "Orion" Type STABS, 79, 190. Photography: advantages, 28: star trails, 29; with camera, 29-33; clusters, 33, 44; Moon. 33, 34; with Yerkes tel-escope, 33-36: with reflectors, 40-45; of nebulae, 41-45, 203: solar spectrum, 60-64,247,248; Sun, 70-72. 244, 245; eclipse, 74-76: with spectroheliograph, 81-96, 139-42, 149. 150, 236, 237, 248; Stella spectra. 104,105,165-71.189-97,203; coro-na, without eclipse, 115-18; Milky Way, 128.129; with Snow telescope. 137, 138; sun-spot spectra, 152-54; metallic spec-tra, 158-62. Photosphere: structure, 69-72. Pbtysius: fundamental importance of, 5. Piu Dc Midi, 119. Piukerino. E. C.: objective prism, 189; stellar spectra, 201. Pike's Peak: expedition to, 115,116. Planetesimal Hypothesis, 208-10. Pleiailes, 18. 44,129,177,198. 202. Potsdam Astrophysiual Orservatory, 100, 167. Prism: formation of spectrum, 48; ob-jective, Fraunhofer, 189; objective, Pickering. 19; glass, 236. Prominenues, 15; nature of, 76; without eclipse, 77; spi ctrum, 78; seen with open slit, 81; quiescent and eruptive. 81. 93; photography of, 82; H and K in, 84. Pyrueliometer, 215. Quartz: fusod. for telescope mirrors. 233-35. Radiometer, 172. Radium, 212, 213. Ramsay: discovery of helium, 78. Reversing Layer, 143. Rituhey: photograp1 s of Moon, 33, 34; photography with Yerkes telescope, 83, 36; 24-inch reflector, 43; photography with reflector, 44: telescope construc-tion, 43, il9-30; 100-inch reflector, 238-40. Rituhey And Barnard: photography of corona, 76. Rorerts: Andromeda nebula, 41. Rosse: 6-foot reflector, 38. 39. Rotation: solar, ...