Elementary Science by Grades Book Four: A Nature Study and Science Reader (1929)
Persing, Ellis C., Wildman, Edward E. · D. Appleton and Company · leaf 179
Courtesy oj me U. a. i\Tavy Department. THE LOS ANGELES IS MOORED TO ITS MAST. CHAPTER 19 AIRSHIPS AND BALLOONS What is a dirigible balloon? What keeps the airship np in the air? What is inside the balloons? How would you like to go on a trip in a large dirigible or airship? You may have seen or…
Science · Ants · Wasps · Turtles · Crayfish · Trees · Mushrooms · Birds · Beavers · Muskrat · Bears · Milky Way · Balloons · Water · Windmills · Kites
Internet Archive · National Library of Education · Public domain (published before 1931). Free to use for anything.
