Algebra and magical numbers

✍ Scribed by C.

• Book ID: 104129225
• Publisher: Elsevier Science
• Year: 1933
• Tongue: English
• Weight: 60 KB
• Volume: 215
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(33)91266-1

✦ Synopsis

CUI~RENT TOPICS. 22I

range from I8.9 to I6.2 lumens per watt efficiency. Since the mercury tubes are made of glass, the ultra-violet rays are absorbed and only the visible portion of the mercury vapor spectrum is utilized.

C.