| | | | correcting lens. |
+--------------+-----------+------------+-------------+------------------+
| Strasburg | 20.5 | 23 |Merz and | |
| Observatory | | |Repsold, 1880| |
+--------------+-----------+------------+-------------+------------------+
| Brera | | | Merz and | |
| Observatory, | 19.1 | 23 | Repsold | |
| Milan | | | | |
+--------------+-----------+------------+-------------+------------------+
| Dearborn | | | A. Clark and| Mounted 1864. |
| Observatory, | 18.5 | 27 | Sons, 1862 | |
| Illinois | | | | |
+--------------+-----------+------------+-------------+------------------+
| National | | | Henrys and | Coude Mount. |
| Observatory, | 18.1 | 29.5 | Gautier, | Visual. |
| La Plata | | | 1890 | |
+--------------+-----------+------------+-------------+------------------+
| Lowell | | | Brashear, | Mounted with a |
| Observatory, | 18 | 26.3 | 1894 | 12-inch Clark |
| Flagstaff, | | | | refractor as |
| Arizona | | | | counterpoise. |
+--------------+-----------+------------+-------------+------------------+
| Van der Zee | | | Fitz | Dismounted. |
| Observatory, | | | | |
| Buffalo, | 18 | -- | | |
| N.Y. | | | | |
+--------------+-----------+------------+-------------+------------------+
|Bischoffsheim | | | Henrys and | Coude Mount. |
| Observatory, | 16.5 | 26.2 | Gautier, | Visual. |
| Nice | | | 1889 | |
+-------------=+-----------+------------+-------------+------------------+
| University | | | Henrys and | Coude Mount. |
| Observat