Past \ i j Pearson : Note on Shorea robusta (Sal) Timber. 7 
Conclusions arrived at from tests for Transverse Strain — 
(1) Taking the results as a whole, they are extraordinarily uniform » 
thus the averages for Central Provinces and United Pro¬ 
vinces, plains-grown Sal, are 6-96 and 7-46 tons and those 
of hill-grown Sal 7-21 and 7-92 tons per square inch, respec¬ 
tively. Six years ago, similar tests were carried out on 
timber cut from the same localities, the corresponding results 
for Central Provinces and United Provinces Sal being 7'298 
and 7*215 tons per square inch, respectively. It may there¬ 
fore be taken as an established fact that the transverse 
strength of Sal timber is approximately 7 tons per square 
inch. 
(2) The United Provinces Sal is slightly stronger than that from 
the Central Provinces, though for working purposes the 
difference is insignificant. 
3) Logs were felled in September, December and June, in the 
same localities and seasoned in correspondingly different 
ways. The results are, therefore, comparative. The timber 
felled in September gave 7T4 tons per square inch, that 
felled in December gave 7*42 tons per square inch and that 
in June 7T3 tons per square inch. The timber felled when 
the sap was down was the strongest. 
(4) There is no marked difference in the strength of timber which 
has been seasoned on land, and that from logs first immersed 
in water and then seasoned on land. It is true that the speci¬ 
mens recorded under serial No. 11, which were cut from 
a log immersed in water for 2j years, only showed 5*80 
tons per square inch, on the other hand specimens cut from 
a similarly treated log and recorded under serial No. 4 showed 
7'06 tons per square inch. 
(5 The only example of coppice grown timber gave 6*03 tons per 
square inch. Further tests are necessary to ascertain 
whether this class of timber is uniformly less strong than 
timber of seedling origin. 
[ 12b ] 
