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Arsia Silva Arsine Augila Bandusiae Fons Biblis Fons Castalia Fons Ceraunius Clepsydra Fons Cyane Fons Ferentinae Lucus Fons Juventae Gallinaria Silva Hercynia Silva Hibe Hippocrene Fons Hipponitis Palus Hypelaeus Labeatis Lacus Lacus Ismenius Lacus Lunae Lacus Phoenicis Lerne

Lucrinus Lacus Lucus Angitiae Lucus Feronia Lucus Maricae Maeisia Silva Mapharitis Mariotis Meroe Messeis Fons Nitriae Nodus Gordii Pallas Lacus Propontis Serapium Sirbonis Lacus Solis Fons Solis Lacus Tithonius Lacus Trinythios Trivium Charontis Utopia

II. DOUBLE CANALS

Even more markedly unnatural is another phenomenon of this most phenomenal system, of which almost every one has heard, and which almost nobody has seen,—the double canals.

To see them, however, all that is needed is a sufficiently steady air, a sufficiently attentive observer, and the suitable season of the Martian year. When these conditions are observed, the sight may be seen without difficulty, and is every whit as strange as Schiaparelli, who first saw it, has described it.