Stage 2: v. 1: The earth; illustrations by Tony Smith.__ v. 2: Time; illustrations by Tony Smith.__ v. 3: Fire; illustrations by Tony Smith.__ v. 4: Air; illustrations by Tony Smith.__ v. 5: Water; illustrations by Tony Smith.__ v. 6: Handicrafts of the Arab world; illustrations by Philip Corke.__ v. 7: Hospitals.__ v. 8: Musical instruments.__ v. 9: Trade; illustrations by Douglas Cameron.__ v. 10: Weather.__ v. 11: The polar regions.__ v. 12: Books.__ v. 13: Farming the desert.__ v. 14: Airports.__ v. 15: Farms; illustrations by Sheila Faichney.__ v. 16: Irrigation