Biblio
“Some Topographic And Climatic Characters In The Annual Ring Of The Yellow Pines And Sequoias Of The Southwest ”. Proceedings Of The American Philosophical Society LXI (No. 2). Proceedings Of The American Philosophical Society.
. 1922. 
“Dating Our Prehistoric Ruins”. Natural History. Natural History.
. 1921. 
“Evidence Of Climatic Effects In The Annual Rings”. Ecology 1 (No. 1). Ecology.
. 1920. 
“An Automatic Optical Photograph, Abstract”. Publications Of The Astronomical Society Of The Pacific. Publications Of The Astronomical Society Of The Pacific.
. 1919. 
“The Steward Observatory Of The University Of Arizona”. Publications Of The Astronomical Society (No. 178). Publications Of The Astronomical Society.
. 1918. 
“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.
. 1916. 
“An Optical Photograph”. The Astrophysical Journal XLI (No. 3). The Astrophysical Journal.
. 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.
. 1915. 
“A Method Of Estimating Rainfall By The Growth Of Trees”. Bulletin Of The American Geographic Society XLVI. Bulletin Of The American Geographic Society.
. 1914. 
“A Photographic Periodogram Of The Sun-Spot Numbers”. The Astrophysical Journal, XL (No. 3). The Astrophysical Journal, .
. 1914. 
“Where-When Did Masonry Originate”. Arizona Daily Star. Arizona Daily Star.
. 1912. “Drawings Of A Comet”. Popular Astronomy. Popular Astronomy.
. 1910. 
“El Cometa De Halley”. Tucson Citizen. Tucson Citizen.
. 1910. “Halleys Comet”. Tucson Citizen. Tucson Citizen.
. 1910. “Weather Cycles In The Growth Of Big Trees”. Monthly Weather Review. Monthly Weather Review.
. 1908. 
“Boating Down The Colorado”. University Of Arizona Monthly 8 (No. 1). University Of Arizona Monthly.
. 1907. 
“The Illusions Of Vision And The Canals Of Mars”. Popular Science Monthly. Popular Science Monthly.
. 1907. 
“Is Mars Inhabited?”. The Harvard Illustrated Magazine Vol. VIII (No. 6). The Harvard Illustrated Magazine.
. 1907. 
“Physical Geography”. Tempe Normal School. Tempe Normal School.
. 1906. “A New Almucantar”. Popular Astronomy. Popular Astronomy.
. 1903. 
“Altitudes And Locations”. Coconino Sun. Coconino Sun.
. 1901. “Astronomical Telegrams”. Publications Of The Astronomical Society. Publications Of The Astronomical Society.
. 1901. 
“Photographs Of The Zodical Light”. Astronomical Society Of The Pacific XIII (No. 78). Astronomical Society Of The Pacific.
. 1901. 
“A Hypothesis Regarding The Surface Markings Of Jupiter”. Popular Astronomy (No. 79). Popular Astronomy .
. 1900. 