Zeppelin Navigation and Lightning Danger. 1915.

For Sale is a Full Page removed from "The Sphere, February 20th, 1915," called "Zeppelin Navigation and Lightning Danger," showing how Zeppelin airships become electrically charged when flying free in the atmosphere and the dangers which result.

These notes have been extracted and revised by a Sphere aeronautical expert from an article by Professor Dr. H. Sieveking of Karlsruhe.

Condition is Very Good.