Studies in spectrum analysis / by J. Norman Lockyer.

  • Norman Lockyer
Date:
1904
Catalogue details

Licence: In copyright

Credit: Studies in spectrum analysis / by J. Norman Lockyer. Source: Wellcome Collection.

    17/302 page 11
    riG. PACB 17. Long and short lines of Strontium and Calcium 54 18. Arrangement of electric lamp for demonstrating the existence of long and short lines 19. Plan and section of cup used with salts ...... 59 20. Aluminium cup placed in the spark-stand as in use .... 60 21. Method of observing the spectra of solutions 63 22. Examination of the spectra of solution by blowing the solute into the Bunsen flame by means of a “ spray inhaler . . . .64 23. Diagram illustrating the various kinds of absorption, and the cha- racteristic absorption of some bodies 67 24. Absorption of different thicknesses of the colouring matter of litmus . 69 25. Arrangement for observing the absorption spectra of metallic vapours 70 26. Arrangement for observing the absorption spectra of the metals driven into vapour bv the oxhyydrogen flame 73 27. Reduced copy of Becquerel’s photograph of the complete solar spec- trum taken in 1842 84 28. Wave-length solar spectrum showing the lines (from L to R) the positions of which have been determined by Mascart... 84 29. The H-lines in the blue end of the solar spectrum, from a photo- graph by the author 86 30. Dr. Millers arrangements for photographing spectra ... £9 31. Dr. Miller’s diagrams of the ultra-violet spectra of some of the ele- merits in air 90 32. Copies of Dr. Miller’s maps of the ultra-violet spectrum of platinum in various gases showing the length of the solar and ultra-violet spectrum 91 33 Slit allowing five photographs to be taken on the same plate by using successively different portions 97
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