Key to Objects on the DrawingsNorth polar capCerauniusTharsisTithonius LacusSolis LacusThaumasiaAonius SinusBosphorus GemmatusAuroræ SinusOphirGangesLunæ LacusTempeSketch published in JRASC, 1918.

Key to Objects on the DrawingsNorth polar capIndistinct shadings in Eden and ArabiaSinus SabæusSolis PonsSyrtis MajorOsiridis Prom.Nili PonsWhite regionNeith RegioSketch published in JRASC, 1918.

Key to Objects on the DrawingsNorth polar capMare AcidaliumEdenEdomSinus SabæusDeucalionis RegioSyrtis MajorOsiridis Prom.Nili PonsWhite regionSketch published in JRASC, 1918.

Key to Objects on the DrawingsNorth polar capMare AcidaliumBaltiaTempeHydaspesIndusAromatum PromontoryAuroræ SinusMargaritifer SinusDeucalionis RegioFastigium AryaSinus SabæusWhite RegionSketch published in JRASC, 1918.

Published in JRASC, 1918.

50. Four views of Mars, showing canals. (Lowell)

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49. Two views, showing seasonal change on Mars. (Lowell)

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48. Three photographs of Mars, showing rotation. (Yerkes Obs.)

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