Photo-Mechl. Dept., Thomason College, Roorkee. 
Degree of penetration into the wood of a and b Pterocarpus 
macrocarpus and c and d Shorea robusta —(i) immersed in, (ii) 
painted over with Avenarius carbolineum. 
[To face Plate III. 
Pearson—Antiseptic Treatment of Timber. plate ii. 
