Pearson—Antiseptic Treatment of Timber. 
PLATE III. 
Degree of penetration into the wood of a and b Picea Morinda and 
C and d Boswellia serrata —(i) immersed in, (ii) painted over with 
Avenarius carbolineum. 
Photo-Mechl. Dept., Thomason College, Itoorkee. 
[To face Plate II. between pages 56 & 57. 
