This was perhaps the most important question settled at the Conference, and the answers to many of the others naturally followed. The size of the plates, for instance, was settled automatically. The question down to what degree of faintness should stars be included, resolved itself into the equivalent question, What should be the length of time during which the plates were exposed? Then, again, the question, What observatories should take part in the work? became simply this: What observatories could afford to acquire the instruments of this new pattern and get other funds for carrying out the work specified? It was ultimately found that eighteen observatories were able to obtain the apparatus and funds, though unfortunately three of the eighteen have since found it impossible to proceed. The following is the original list, and in brackets are added the names of three other observatories which in 1900 undertook to fill the places of the defaulters. OBSERVATORIES CO-OPERATING FOR THE ASTROGRAPHIC CHART. +----------------------+------------+----------+ | Observatory. | Zones of | Number | | |Declination.|of Plates.| +----------------------+------------+----------+ |Greenwich |+90° to +65°| 1149 | |Rome |+64° " +55°| 1140 | |Catania |+54° " +47°| 1008 | |Helsingfors |+46° " +40°| 1008 | |Potsdam |+39° " +32°| 1232 | |Oxford |+31° " +25°| 1180 | |Paris |+24° " +18°| 1260 | |Bordeaux |+17° " +11°| 1260 | |Toulouse |+10° " + 5°| 1080 | |Algiers |+ 4° " - 2°| 1260 | |San Fernando |- 3° " - 9°| 1260 | |Tacubaya |-10° " -16°| 1260 | |Santiago (Monte Video)|-17° " -23°| 1260 | |La Plata (Cordoba) |-24° " -31°| 1360 | |Rio (Perth, Australia)|-32° " -40°| 1376 | |Cape of Good Hope |-41° " -51°| 1512 | |Sydney |-52° " -64°| 1400 | |Melbourne |-65° " -90°| 1149 | +----------------------+------------+----------+ [Sidenote: Sky covered twice.]