FA Vintage model modelling airships dirigible planes 1910s

Flying and Some of Its Mysteries by V E Johnson MA ,Author of The
Theory and Practice of Model Aeroplaning and the Gyroscopic Control of
Aeroplanes,undated,but appears to date from around the 1910s,fading to
spine,otherwise VGC. 138 pages.
Superd edwardian science book,packed with projects on model
ballooning,fire balloons, gas drift balloons,dirigibles, kites,model
helicopters,aeroplanes (mono and biplanes) with many delightful period
illustrations. Emphasis on balloons,which I believe were seen as the
"coming thing" at this time! Very scarce book.