Clusters in Hercules 1874. Plate 24 in “Astronomical Engravings Prepared at Harvard College Observatory 1872-75.” NOAA Central Library Rare Book , Call No. QB86.H3 1876.
| 479 x 640 | 29.12 KB | |
| 957 x 1280 | 120.89 KB | |
| 1435 x 1920 | 293.08 KB | |
| 2159 x 2890 | 737.61 KB |
| Added On | 18th October 2015 |
| Viewed | 5 viewed |