ABSTRACT OF PROCEEDINGS. M 
12. Another ; an attempt to make the body plane more stable. 
13. Another; the portion of a bat’s wing near the body is only 
aeroplane, the wing tip only propels. 
14. Another on the same principle. 
15. A very good 48 band india rubber driven flying machine. 
By an unfortunate chance this machine is perfectly balanced and 
flies quite straight; this led to many more flat machines being 
made before the inherent instability of a single plane was recog- 
nised. 
16. The same, showing arrangement of purchase and winder. 
17. Trochoided wing with very short connecting rod. Vessel 
with interchangeable screw and twin trochoided planes. 
18. Large machine to see what effective push I could exert. 
The seat is the bar under the two foot rule ; the stretcher for the 
feet is to the left of the picture; the hands grasp the handles 
showing just above the detached wing standing against the sheet. 
The handles are pulled over the top centre and pushed at the 
bottom centre. The dynagraph was attached to one of the parallels 
at the wing roots. 
19. First compressed air engine. MRichard’s indicator (home 
made). Two sorts of reducing valve. This engine always stuck 
on the centre till the india rubber band was attached as shown. 
Enlarged view of valve setting, to the right. 
20. Arrangement of gear to test the push of engine with three 
cylinders revolving on a fixed crank shaft. Air pump and receiver. 
Clock for driving the drum. Seconds marker. Fan to steady the 
drum. SBending stick to push against. Calibrating gear. 
21. Bow and stern screw dihedral-angle machines. 
22. Forty-eight band stern screw machine. 
23. Attempt at a naphtha engine machine, 
24, Shows the figure of eight described by the trochoided plane 
25. Three cylinder engine revolving on fixed crank shaft. 
