Old America - Ancient Ruins Ottinger, G.M.. "Old America - Ancient Ruins." Juvenile Instructor 10, no. 11 (1875): 131-132.
Old America - The Toltecs Ottinger, G.M.. "Old America - The Toltecs." Juvenile Instructor 10, no. 7 (1875): 80-81.
Votan, The Culture-Hero of the Mayas Ottinger, G.M.. "Votan, The Culture-Hero of the Mayas." Juvenile Instructor 14, no. 5 (1879): 57-58.
Old America - Araucanians, Brazilians, Etc. Ottinger, G.M.. "Old America - Araucanians, Brazilians, Etc." Juvenile Instructor 11, no. 10 (1876): 111-112.
Old America - The Phoenicians Ottinger, G.M.. "Old America - The Phoenicians." Juvenile Instructor 10, no. 3 (1875): 32-33.
Old America - The Mexican Calendar Ottinger, G.M.. "Old America - The Mexican Calendar." Juvenile Instructor 10, no. 9 (1875): 98-99.
Old America - The Aztecs Ottinger, G.M.. "Old America - The Aztecs." Juvenile Instructor 10, no. 4 (1875): 40-41.
Old America - The Mastodon and the Horse Ottinger, G.M.. "Old America - The Mastodon and the Horse." Juvenile Instructor 11, no. 11 (1876): 128-129.
Old America - Jared Ottinger, G.M.. "Old America - Jared." Juvenile Instructor 10, no. 1 (1875): 3-4.
Old America - Tezcucians, Tlascalans, Quiches, Etc. Ottinger, G.M.. "Old America - Tezcucians, Tlascalans, Quiches, Etc." Juvenile Instructor 10, no. 10 (1875): 110-111.
Old America - Ancient Ruins (3) Ottinger, G.M.. "Old America - Ancient Ruins (3)." Juvenile Instructor 10, no. 13 (1875): 155-156.
Old America - The Aztecs (Continued) Ottinger, G.M.. "Old America - The Aztecs (Continued)." Juvenile Instructor 10, no. 6 (1875): 63-64.
Old America - Ancient Peru (Continued) (6) Ottinger, G.M.. "Old America - Ancient Peru (Continued) (6)." Juvenile Instructor 11, no. 3 (1876): 27-28.
Old America - Ancient Ruins (6) Ottinger, G.M.. "Old America - Ancient Ruins (6)." Juvenile Instructor 10, no. 16 (1875): 182-183.
Old America - Ancient Ruins (5) Ottinger, G.M.. "Old America - Ancient Ruins (5)." Juvenile Instructor 10, no. 15 (1875): 178-179.
Old America - The Mound Builders Ottinger, G.M.. "Old America - The Mound Builders." Juvenile Instructor 10, no. 19 (1875): 220-221.
Old America - Ancient Ruins (2) Ottinger, G.M.. "Old America - Ancient Ruins (2)." Juvenile Instructor 10, no. 12 (1875): 142-143.
Old America - Jared (Continued) Ottinger, G.M.. "Old America - Jared (Continued)." Juvenile Instructor 10, no. 2 (1875): 14-15.
Old America - Casas Grandes Ottinger, G.M.. "Old America - Casas Grandes." Juvenile Instructor 10, no. 18 (1875): 206-207.
Old America - Conclusion Ottinger, G.M.. "Old America - Conclusion." Juvenile Instructor 11, no. 12 (1876): 134-135.
