Proceedings of the stated meeting held Wednesday, November 17, 1915

✍ Scribed by R.B. Owens

• Publisher: Elsevier Science
• Year: 1915
• Tongue: English
• Weight: 49 KB
• Volume: 180
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(15)90409-x

✦ Synopsis

presented the paper of the evening, entitled " On the Ruling of Diffraction Gratings." The speaker reviewed the history of the ruling of gratings, and gave an account of the work of Rutherford, Rowland, and others. He pointed out the difficulties eocountered in making gratings of large size and high resolving power, and described the devices employed for overcoming such difficulties, especially by the use of interference methods. Reference was also made to some of the modern problems requiring high resolving power. The subject was illustrated by lantern slides, specimens of gratings, and apparatus.

The Chairman requested Dr. Hoadley to preside during the discussion, in which Messrs. Saunders, Henderson, Levy, Bond and Drs. Golds,nith, Trowbridge, Barnes, Northrup, Goodspeed, and Ives participated. After a vote of thanks to the speaker the meeting adjourned.