Report of the Meetings Volume 22

Report of the Meetings Volume 22

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1853 edition. Excerpt: ...I procure a flame-like chromatic image of great intensity, 1 inch in length, from a vertical opening in my steel plate. I have adopted this as my measure throughout, dividing it into 100 equal parts: thus, all the numbers employed are intended to express inches, or the one-hundredth part of an inch. The first part of the present Report is devoted to the examination of the prismatic spectrum by coloured glasses of various kinds. The numbers affixed may appear somewhat irregular, but as they correspond with a very extensive series, over many of which I have no control, but which are well known to me by these numbers, and can always be obtained, I have thought it best to retain them. I have however adopted the plan of numbering my paragraphs, so that in referring back there will be no difficulty in comparing the chemical with any particular luminous spectrum. As I hope to present to the next meeting a far more complete examination of this subject, I refrain from ofi'ering a single speculation, contenting myself for the present with the record of careful observations and exact experiments. The lines a a' indicate throughout the length of the normal spectrum. ANALYSIS or SPECTRUM BY ABSORBENT MEn1A.--No. 1. (A.) Series of Yellow Glasses. (4) 16. DEEP YELLOW. Colouring matter Carbon, fig. l.--The Fig-1ordinary red rays veryintense, but partaking more of ascarlet colour from the mixture of yellow than a pure red; the orange and red rays blend so perfectly that it is difiicult to define their boundaries. Combined, these rays occupy '12. The yellow rays are reduced to a line of bright light equal to '10. Beyond these the green rays appear very intense, and occupy a well-defined space equal to 'Q5. Blue and violet rays, confined within...show more

Product details

  • Paperback | 284 pages
  • 189 x 246 x 15mm | 513g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236804058
  • 9781236804051