1918.] The N.Z. Journal of Science and Technology. 241 
sample of “ Anti-damp,” 5 gallons of each. Fractionation of these gave 
the results shown in Table II. 
Table II.—Fractionation of “ Lignolite." 
(Specific gravity at 16° C., 0*0968.) 
Fractions. 
Temperatures. 
Percentage. 
I 
Below 170° 
8*35 
II 
170°-205° 
4*61 
III 
205°-235° 
4*40 
IV 
235°-255° ’ 
5*07 
V 
255°-265° 
12*35 
VI 
265°-275° 
17*35 
VII 
275°-295° 
4*37 
VIII 
295°-315° 
21*24 
170° 190° 210° 230° 250° 270 c 290° 310° 330° 
Temperature. ( Deg Cent ) 
Fig. 3.— 'Distillation graph of “ Lignolite.” 
WATER-SOLUBLE PRESERVATIVES. 
Zinc Chloride .—The solution used in these tests was made up according 
to the specifications of the American Wood-preservers’ Association—- i.e 
3*5° Baume at 70° F. This is stronger than the Burnett specification of 
2 per cent. (2° Baume). 
Sodium Fluoride . — As this salt is being investigated only on the Continent 
of Europe and in the United States, and as the reports so far seem to point 
to its being even more efficacious than zinc chloride, these investigations 
would not be complete without its inclusion. In the absence of any refer¬ 
ence a solution containing 2 per cent, (i.e., of specific gravity 1*022) was 
used. It does not discolour the wood in any way, and is cleaner to work 
than the zinc chloride. So far as one can judge at the present stage, it 
quite deserves the high reputation that reports have given it. 
Powellizing Solution . — This was obtained from the Railway Department’s 
plant at Woodend, Southland, and was included for purposes of comparison, 
as well as to estimate its value with New Zealand woods. 
16—Science. 
