Part I.] Pearson: Antiseptic treatment of Sleepers. 
29 
5. Miscellaneous points brought out by the experiments. 
The question of carefully passing sleepers before treatment was very 
prominently brought out by these experiments. With few exceptions 
this was not done, with the result that a few sleepers of each batch 
had to be rejected for mechanical defects soon after they were laid down 
The great importance of laying treated Pine sleepers heart up and sap 
down was also a noticeable feature of the results, while the necessity 
of adzing and boring sleepers before treatment, whenever possible, was 
clearly demonstrated in the case of the Dipteroearp sleej)ers, which only 
failed under the rail seat while the rest of the timber was in a sound 
condition. And lastly, too much care cannot be taker in selecting the 
grade of creosote to be used : analyses should be made of every bulk 
sample received for treating sleepers. 
[ 29 j 
c 
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