15 
TABLE SHOWING THE AMOUNT OF PEARL-ASH AND PURE POTASH AFFORDED BY ONE TON OF 
“ FRESH BRANCHES, WITH LEAVES,” AND ONE TON OF “FRESH” OB “DRY” TRUNK-WOOD, 
WITHOUT HARK. 
Species of Tree. 
Branches, with Leaves 
as freshly loppod off the tree,* 
would furnish— * 
Fresh— 
Dry— 
Trunk- wood, stripped of its bark, would furnish— 
Soluble Salts may bo 
regarded as equivalent 
to Pearhasb. 
Pure Potash. 
Soluble Salts may be 
regarded as equivalent 
to Pearl-ash. 
Pure Potash. 
Soluble Salts mav be 
regarded as equivalent 
to Pearl-ash. 
Pure Potash. 
Casuarina quadrivalvis 
suberosa 
Banksia Australis 
Acacia dectirrens . . 
Melaleuca ericifolia 
Eucalyptus globulus 
rostrata 
▼imnaiis .. 
melliodura .. 
obliqua ** .. 
6 lbs. 1 07.. 
7 „ 12 „ 
7 li :: 
^1:: 1:: 
5 tf 6 
5 „ 1 »» 
7 8 ., 
2 lbs. 3 oz. 
3 „ 12 „ 
2 1 
1 :: 
4 12 ., 
i :: li :: 
2 „ 12 „ 
1 lb. 14 oz. 
8 „ 14 „ 
2 i» ? ** 
2 „ 0 „ 
1m 11 M 
1 „ 2 „ 
1 lb. ‘ 2 oz. 
2 »i 6 „ 
1m 5 ,. 
1 ’ I " 
*1 »» 
0 „ 9 „ 
7 lbs. 3 oz. 
'• ,? » 
2 „ 15 „ 
16 „ 13 „ 
4 M 8 „ 
4 »» 0 „ 
3 „ 2 „ 
1 9 „ 
0 .. 14 „ 
4 lbs. 8 oz. 
6 8 
1 M 13 
4 „ 8 „ 
2 M 11 „ 
2 „ 4 ,. 
1 » }? ’• 
0 „ 14 „ 
0 „ 7 ,. t 
f Pi ne wood furnishes 
1 Beech 
According to Hbss, one too of . . , . . . . . 
^ jEim !! !! !! !! 
LwUlow 
1 lb. 0 oz.t 
2 14 „ X 
1 M 11 M 
3 6 „ t 
8 .. 12 „ X 
6 M 6 .. t 
/Oak-wood furnishes 
ilitne 
According to Berthier, the ash from one ton of .. ••‘{pine^ 
J Nut tree .. 
\Elder 
6 lbs. 12 oz. 
12 M 2 „ 
3 „ 9 „ 
3 „ 12 „ 
5 ,. 7 „ 
11 » 9 M 
.. 
* These calculations are based upon the assumption, hat the proportion of leaves to branch-wood would be the same as was foimd to exist on those 
collected for our local investigation. 
t The trunk-wood of the E. obliqua was from an old tree, and scarcely so healthy as could have been desired ; this may account to some extent for the 
■mall perc ntage of potash which it was found to contain. 
X These numbers correspond very closely with the mean of results obtained by Saussure, Vauquelin, Pertuis, and Kirwan. ^ 
Melbourne price of pearlash 453. to 56s. per cwt. 
CONTENTS OF IODINE IN THE LAKGE LEATHEUY NATIVE SEAWEED, UKVILLEA POTATORUM. 
Percentageof ash in weed dried at 212“ F., 26’61. Percentage of Iodine in the ash, 0*053 (mean of two analyses). The ash likewise contain# small 
quantities of bromine, the amount of which, however, was not estimated. 
This plant, when air-dried, measured 13 feet in length, breadth of main leaf 6 inches, thickness of leaf one-sixteenth inch. 
TABLE SHOWING THE PERCENTAGE OF ASH, AND OF IODINE IN THE ASH, OF CERTAIN 
EUROPEAN ALGAE. 
Species of Seaweed. 
Locality. 
Percentage of A Bh 
in Weed dried at 212* F. 
Percentage of Iodine 
in Ash. 
Authority. 
Laminaria saccharina .. 
North Sea 
9*78 
3*98 
Schweitzer. 
Fucus digitatus 
Mouth of the Clyde 
20*40 
3*06 
Giidechens. 
serratus 
Mouth of the Clyde 
15*63 
1*13 
Godechens. 
serratus 
Nortli Sea 
25*83 
0*23 
Schweitzer. 
nodfisus 
Mouth of the Clyde 
1619 
0-46 
Godechens. 
vesiculosus 
Mouth of the Clyde 
16*39 
031 
Godechens. 
vesiculosus 
North Sea 
20*56 
0*11 
Schweitzer. 
