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