400 J. H. MAIDEN AND H. G. SMITH. 
Acacia Maideni, F.v.M. (N. O. Leguminose), 
“ Broad-leaved Sally.” 
Collected at Woodburn, N. S. Wales. 
Our sample of this gum is in small pieces of a light amber colour, 
rather brittle, with very bright fracture, but without the dark 
brown objectionable portions so common in the Acacia gums, 
especially A. decwrrens. When treated with cold water, almost 
the whole of the gum slowly goes into solution, forming a very 
pale coloured liquid which is very adhesive, of good body or having 
a high viscosity. It is however, rather tedious to dissolve. The 
solution is slightly acid to test paper. It forms a solid cream- 
coloured jelly with ferric chloride, thus showing absence of tannin, 
It does not thicken with borax solution, nor does it undergo any 
change with mercuric chloride. It gives a precipitate with basic 
acetate of lead. It gives a dense white precipitate with alcohol 
in acid solutions. It slightly darkens to a canary colour when 
warmed with dilute soda solution. It contains 16:15 per cent. 
water and 4:67 per cent. ash ; the ash consists principally of the 
carbonates of lime and manganese and potassium, with sulphuric 
acid, and only the merest trace of phosphoric acid. The ash con- 
tains fusible salts and is difficult to incinerate, it contains only 
a trace of manganese. 
Albizzia pruinosa, Benth. (N. O. Leguminose). 
Usually known as “ Stinkwood.” 
Collected at Cumbulum, near Tintenbar, N. 8. Wales. 
This sample is in small amber coloured pieces, and is very much 
admixed with woody matter. It is fairly transparent and breaks 
with a bright fracture. It is only partly soluble in water the 
soluble portion being arabin ; it forms a fairly adhesive liquid. It 
gives no precipitate with ferric chloride nor does it form a jelly, 
and only slightly darkens when heated with dilute soda. ‘The 
insolwble: portion.ia:scluble in dilate alkalis, andvie pocnueee 
as arabin on acidifying with acetic acid and adding alcohol. 
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