36 H. G. SMITH. 
E. sideroxylon approaches E. crebra in this respect while 
E. paniculata would appear to require good land similar to 
that chosen by the members of the “‘Box”’ group. The 
presence of manganese in the soil is essential for all, and 
it may appear remarkable perhaps that no matter whether 
the percentages of the total mineral substances in the 
timbers of the “‘ Ironbarks”’ be great or small the percentage 
of manganese in the ash is practically the same with all of 
them. The indication is that the “‘Boxes’”’ also, as well 
as the other groups will also show agreement in this 
respect when complete data shall be available. 
Table No. I. 
One part 
of ash in| One part One part Man- 
anhydrous 
pe cros parts ash material 
Percentage] Percen- 
of Ash in | tage of 
anhydrous| Mangan- 
material. jese inash 
£. pilularis 
(wood) Thirlmere ...) 0°051 | 0°200| 1960 500 980,000 
Ashfield ...| 0°065 | 0:200/} 1538 500 769,000: 
Ulladulla ...; 0:041 | 0°260} 2438 385 938,630 
North Coast | 0:029 | 0:210) 3448 476 | 1,641,248 
Marrickville 
No. 1 tree} 0:088 | 0:220) 1136 455 516,880: 
F No. 2 tree} 0:037 | 0:200/} 2703 500 | 1,351,500 
Mean of above calculated from} (:05]8!}| 0:215)| 1930 465 897,450: 
the ash and manganese 
percentages. 
£. pilularis 
(leaves) Marrickville 
No. 1 tree} 2 
a No. 2 tree} 2: 
(buds with petioles) 
No. 1 tree} 3:79 led 
- No. 2 tree} 3:786 | 0°2 
0 
99 
x9 
99 
5 34. ea 2,278 
‘25 37 | 400 14,800 
33 26 75 1,950 
33 26 | 430 11,180 
(seed cases = fruits) 
No. 2 tree | 2°893 "15 35 | 667 23,345. 
(seeds) No. 2 tree ...| 1:044 | 0:316 964. 3ii7 30,432 
EL. regnans 
(wood) Warburton, | 0:054 | 0°274; 1852 | 365 675,980 
Victoria 
(leaves) ditto 2:851 | 0°666 35 | 150 5,250 
E. macrorrhyncha 
(wood) Woodlands | 0:072 | 0°733/ 1390] 136 189,040 
