40 J. H. MAIDEN AND H. G. SMITH. 
It erystallizes from boiling water in plates. Ether dissolves it, 
although not readily; the ethereal solution dries into an almost 
amorphous substance. Alcohol dissolves it easily. a 
The distinctive colour reactions given by eudesmin and this 
body serve at once to distinguish them in the absence of ~ 
determinations of crystalline form. We have provisionally named 
this substance Aromadendrin. 
The chemistry of the substance causing the turbidity in bee 
kino of Angophora lanceolata will form the subject of a later com 
munication. We have succeeded in isolating a few well developed 
erystals of the body, after numerous failures, and hope now . ye 
successful in crystallizing it readily for purposes of investigation. 
PAPER ON AERONAUTICAL WORK. 2 
By Lawrence Harcrave. 
[With Plates I. -IX.] 
[ Read before the Royal Society of N. S. Wales, June 5, 1895.) 
THE paper read before this Society, Vol. xxvit., p. 75, on Flyime : 
Machine Motors and Cellular Kites concluded with some remarks ’ 
about a motor that was exhibited on that occasion. The ath 
was No. 21, and Plates I, 2, 3, show three views of it. The 
weights are remarkably low, but the thrust chronograms made 
by the apparatus show that to attempt a free flight with No. 7 
would be to court disaster. 
The burners and spirit holders that have been tried fail ig 
Produce uniform results. ‘The fault is now thought to be in the 
method of discharging the spirit vapour into the mixing chambel 
The amount of the vapour depends on the heat under the holder, . 
and this again on the amount of air that is admitted to the * 
