26 AUSTRALIAN NATIVE PLANTS. 
transparent liquid when heated to 135° in sealed tubes with 30 
parts of water; this solution on cooling deposits the original 
substance in flocks, without forming a jelly at any time. The 
separation is almost complete. 
“If the material employed in this experiment were entirely 
free from sugar, the liquid left after the separation of the flocks will 
also be free from sugar. The flocks deposited from solution are 
insoluble in boiling water, therefore lerp-amylum suffers no 
chemical change on being heated to 150° with water, Heated in 
the air-bath to 190° while dry, it turns brown, and is afterwards 
merely reddened by solution of iodine; at the same time it 
becomes partly soluble in hot water; hence it appears that lerp- 
amylum undergoes a change similar to that which occurs when 
starch is converted into dextrin. By oxidation with nitric acid it 
yields oxalic acid, but no mucic acid; it is neutral to vegetable 
colours, and is not precipitated by lead acetate, and is therefore not 
to be confounded with the gums, etc. 
“Tt gave by analysis 43°7 and 43°07 carbon, 6°6 and 6°4 hydro- 
gen, agreeing with the formula C,H,,O, (44°4 C. and 6°24 H.) 
Like starch, lerp-amylum rotates the plane of polarisation to the 
right ; and on digestion with dilute sulphuric acid, etc,, forms a 
crystallisable carbo-hydrate which agrees in its properties with 
dextrin. It is insoluble in ammonia cuprate, and is homogeneous. 
“Though the behaviour of lerp-amylum to iodine and to 
water, and its insolubility in cupra-ammonia distinguish it from 
cellulose, it is to be borne in mind that there are forms or condi- 
tions of cellulose which are blued by iodine and dissolve in 
water.” (Flickiger, in Wa/ts’ Dict. vii., 2nd Suppl. 7333) 
See also a paper: ‘‘On anew kind of Manna from New South 
Wales,” by Th. Anderson (fourn. fiir Prakt. Chemic. xlvii., 449.) 
Victoria, and Southern New South Wales. 
78. Eucalyptus dumosa, A. Cunn., (for synonyms see B.FI.), 
N.O. Myrtacee, B.FI., iii.7230. 
The ‘‘ White Mallee,” of South Australia; ‘‘ Weir-Mallee,” of 
aboriginals ; ‘‘ Bunurduk,” of the aboriginals of Lake Hindmarsh Station 
(Victoria). 
