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Radiometer - 1929 spherical Type C with black annulus A

• HF-ID: HFH-0821
• Category: Visual Materials
• Creator: Hodgins (Mr.)
• Date: March 1929
• Media: Photographs
• Contents:
  • 3 black and white photos: 2871 - 4.5"x6".
  • 1 negative - 4.75"x6.75".

• Keywords: meteorology
• Abstract:
  • Art photo.
  • 2871 (R-9). Upper annulus A - painted black over the silvered mirror which reflects down against the lower shield or annulus B. (HF Bulletin No. 14, fig. 8, type C)

• Related Items:
  • Harvard Forest Bulletin No. 14
  • Historical photo 2877: Radiometer 1929 Spherical

• Archives Location: Historical Photographs accordion folder 1, Research - Harvard Forest and NEFES
• Access: Active
• Administrative Notes:
  • Original HF-ID: 2871(R-9)