32 Frank Reade, Jr.’s Search for the Sea Serpent; or, Six Thousand Miles Under the Sea.
33 Frank Reade, Jr.’s Prairie Whirlwind; or, The Mystery of the Hidden Canyon.
34 Around the Horizon for Ten Thousand Miles; or, Frank Reade, Jr.’s Most Wonderful Trip.
35 Lost in the Atlantic Valley; or, Frank Reade, Jr., and his Wonder, the “Dart.”
36 Frank Reade, Jr.’s Desert Explorer; or, The Underground City of the Sahara.
37 Lost in the Mountains of the Moon; or, Frank Reade, Jr.’s Great Trip with the “Scud.”
38 Under the Amazon for a Thousand Miles.
39 Frank Reade, Jr.’s Clipper of the Prairie; or, Fighting the Apaches in the Southwest.
40 The Chase of a Comet; or, Frank Reade, Jr.’s Aerial Trip with the “Flash.”
41 Across the Frozen Sea; or, Frank Reade Jr.’s Electric Snow Cutter.