2.--Boy Scouts in the Ca.n.a.l Zone; or, The Plot Against Uncle Sam.
3.--Boy Scouts in the Philippines; or, The Key to the Treaty Box.
4.--Boy Scouts in the Northwest; or, Fighting Forest Fires.
5.--Boy Scouts in a Motor Boat; or, Adventures on the Columbia River.
6.--Boy Scouts in an Airship; or, The Warning from the Sky.
7.--Boy Scouts in a Submarine; or, Searching an Ocean Floor.
8.--Boy Scouts on Motorcycles; or, With the Flying Squadron.
9.--Boy Scouts Beyond the Artic Circle; or, The Lost Expedition.
10.--Boy Scout Camera Club; or, Confessions of a Photograph.
11.--Boy Scout Electricians; or, The Hidden Dynamo.
12.--Boy Scouts in California; or, The Flag on the Cliff.
13.--Boy Scouts on Hudson Bay; or, The Disappearing Fleet.
14.--Boy Scouts in Death Valley; or, The City in the Sky.
15.--Boy Scouts on the Open Plains; or, The Round-up not Ordered.
16.--Boy Scouts in Southern Waters; or, the Spanish Treasure Chest.
17.--Boy Scouts in Belgium; or, Under Fire in Flanders.
18.--Boy Scouts in the North Sea; or, the Mystery of U-13.
19.--Boy Scout Verdun Attack.
20.--Boy Scouts with the Cossacks; or, Poland Recaptured.