1918.] The N.Z. Journal of Science and Technology. 243 
Duration of test, fourteen months. Averages based on .a total of 
seventy-two specimens, six to each test. Decay shown by controls was 
100 according to scale. 
Table IV.-Zinc-chloride Tests. 
Name of Wood. 
Test. 
Weight 
before. 
Weight after. 
Decay. 
Dry Salt injected 
per Cubic Foot. 
Rimu heart 
2 
Grammes. 
54-75 
Grammes. 
55-50 
60 
Grammes. 
lb. 
White-pine sap 
2 
39-55 
43-50 
50 
. . 
. . 
White-pine heart . . 
2 
45-22 
46-67 
40 
. . 
Red-beech 
2 
87-70 
96-00 
40 
. . 
. . 
Rimu sap 
2 
51-50 
53-00 
40 
, , 
Rimu heart 
3 
57-62 
69-30 
20 
57-6 
0-12 
Rimu sap 
3 
53-22 
76-85 
10’ 
134-4 
0-30 
White-pine heart . . 
3 
40-28 
48-52 
50 
48-0 
o-io 
White-pine sap 
3 
39-25 
64-37 
40 
153-6 
0-33 
Red-beech 
3 
88-62 
113-70 
30 
153-6 
0-33 
Duration of test, sixteen months. In each case the results are the 
averages of four pegs, thus the above data are obtained from thirty-two 
pegs, so that allowance has been made for individual differences sufficient 
to form an estimate of the cost of preserving on the amount of salt used. 
Table V. — Aluminium-sulphate Tests. 
Red-beech (average of twenty-four specimens) 
Test. 
Weight before. 
Weight after. 
Dry Salt per Cubic 
Foot, 
Decay. 
Grammes. 
Grammes. 
Grammes. 
1 
90-60 
98-15 
28-0 
60 
2 
95-65 
105-20 
38-4 
40 
3 
90-15 
110-35 
76-8 
40 
Duration of tests, twelve months. 
Aluminium-sulphate and Zinc-chloride Tests. — Results were so close to 
those obtained for straight zinc-chloride treatment as to afford no ground 
for diluting the latter with the salt. 
Table VI—Treatment of Kamahi with “ Lignolite,” Ac. (Full-cell Tests). 
Amount injected per 
Decay. 
Cubic Fcot. 
“ Lignolite ” . . 
. 1,344 grm. (2-8 lb.) 
Nil 
‘ ‘ Anti-damp 55 
960 grm. (2*0 lb.) 
20 
Control 
* 
50 
Duration of test, six months. 
