Biblio
. 1898. “Scales Of Seeing”. Popular Astronomy. Popular Astronomy.
. 1898. “The First Satellite Of Jupiter”. Abdruck Aus Den Astr. Nachr. Bd. 146.. Abdruck Aus Den Astr. Nachr. Bd. 146.
. “The Crescentic Dunes Of Peru”. Appalachia XII (No.1). Appalachia.
. “Dendrochronology And Studies In Cyclics”. University Of Pennsylvania Bicentennial Conference Proceedings. University Of Pennsylvania Bicentennial Conference Proceedings.
. 1914. “A Method Of Estimating Rainfall By The Growth Of Trees”. Bulletin Of The American Geographic Society XLVI. Bulletin Of The American Geographic Society.
. 1931. “Trees And Droughts In Arizona”. Professional Engineer. Professional Engineer.
. 1925. “Phi Kappa Phi Installation Address”.
. 1897. “Atmosphere, Telescope And Observer”. Popular Astronomy. Popular Astronomy.
. 1910. “Halleys Comet”. Tucson Citizen. Tucson Citizen.
. 1898. “Stellar Bands In The Zodiac From Gemini To Scorpio”. Popular Astronomy. Popular Astronomy.
. 1892. “La Inundacion De 1868”. El Cosmos. El Cosmos.
. 1907. “The Illusions Of Vision And The Canals Of Mars”. Popular Science Monthly. Popular Science Monthly.
. 1933. “Tree Growth And Climatic Cycles”. The Scientific Monthly. The Scientific Monthly.
. 1907. “Is Mars Inhabited?”. The Harvard Illustrated Magazine Vol. VIII (No. 6). The Harvard Illustrated Magazine.
. 1926. “The Significance Of Honor Societies ”. Phi Kappa Phi Journal VI (No. 9). Phi Kappa Phi Journal.
. 1897. “An Ascent Of Popocatepetl”.
. 1941. “Crossdating In Dendrochronology”. Journal Of Forestry 39. Journal Of Forestry.
. 1894. “Gegenschein Observations”.
. 1933. “Evidences Of Cycles In Tree Ring Records”. Proceedings Of The National Academy Of The Sciences. Proceedings Of The National Academy Of The Sciences.
. 1916. “The Callendar Sunshine Recorder And Some Of The World-Wide Problem To Which This Instrument Can Be Applied”. In Second Pan-American Scientific Conference. Second Pan-American Scientific Conference.
. 1915. “Zodical Light And Counter-Glow And The Photography Of Large Areas And Faint Contrasts”. In Royal Photographic Society Of Great Britain. Royal Photographic Society Of Great Britain.
. 1898. “The Markings On Venus”. Monthly Notices Of The Royal Astronomical Society LVIII (No. 78). Monthly Notices Of The Royal Astronomical Society.
. 1921. “Dating Our Prehistoric Ruins”. Natural History. Natural History.

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