by Ira M. Freeman;illustrated with photographs and diagrams by Frank Ross; illustrated with photographs and diagrams by Hal Hellman; illustrated wih photographs and diagrams by Don Dwiggins; illustrated with photographs and diagrams by D. S. Halacy; illustrated with photogarphs and diagrams by Lawrence Maisak; illustrated with photographs and diagrams Augusta Goldin; illustrated with photographs and diagrams by Sarah R.Riedman;illustrated with photographs by Harvey Weiss; illustrated with photographs, plans and drawings Sigmund A. Lavine; illustrated with photographs and old prints