ik ABSTRACT OF PROCEEDINGS. 
previous meeting, were laid upon the table and acknow- 
ledged. 
The President reminded members present of the meeting 
of the Australasian Association for the Advancement of 
Science which takes place in Brisbane, beginning January 
11th next. 
Mr. LAW. HARGRAVE exhibited a series of lantern slides 
(74 in number) illustrating the ‘Evolution of the Flying 
Machine,”’ viz.:— 
1. Two wave moved objects. Two trochoided plane propelled 
boats. Wave propelling. Propeller waving. Converse propo- 
sitions. 
2. Two boats connected by guide, crank and connecting rod, 
trochoiding one another. 
3. Anemometer or wind mill. The wind acting on planes fixed 
at right angles to connecting rods, rotate the crank shaft. This 
shows the soul of natural motion. The square moving in a circle 
guided by a straight line. 
4. A spiral wire rotated between guides, trochoids the sections 
of artificial fishes. 
5. A spiral wire simulates centipede and leech motion. 
6. A spiral wire simulating 6 footed progression. Automatic 
horizontal rudder for aeroplanes. 
7. The handle is turned, the return cranks at the centre trochoid 
the sections of the snake and it runs round the track. The snake 
and its vertical shaft is replaced by the other shaft seen to the 
left, the two connecting rods trochoid the single wheel, which then 
runs round the track. 
8. A few small flying machines. 
9. An excellent model, about the best that can be done with 
clock work. Note the weakness of the spring and small pinion. 
10. India rubber driven flying machine. 
11. Another, the head surface has disappeared. 
