Excerpt from The Popular Science Monthly, Vol. 65: May to October, 1904
Address delivered on November 23, 1903, before the University of Chicago Chapter of the Society of Sigma Xi.
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Paperback. Condizione: New. Print on Demand. This book traces the development of the spectroheliograph, an instrument allowing scientists to study the Sun's gaseous prominences and the structure of its disk. Initially frustrated by the lack of a suitable spectral line, the author's eventual discovery of two bright lines in the violet and ultraviolet regions of the prominence spectrum led to significant advancements. The author's first successful experiments in using a spectroheliograph of their own design enabled them to capture images of both the solar prominences and a previously unobserved network of calcium clouds, revealing a complexity of solar phenomena previously hidden from observation. The significance of this spectroheliograph is not limited to its ability to capture images of the Sun, but also its applicability to other substances, promising to reshape our understanding of the Sun's vapors and the evolution of celestial bodies. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. Codice articolo 9781330291733_0
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