Forest Bulletin No. 74. Summary of results of Treated Experimental Sleepers laid in the various Railway Systems of India brought up to date

4.-Ficus elas.tica : its natural growth and artificial propagation with a description of the method of tapping the tree and of the preparation of its rubber for the market by E. M. Coventry I.F. [...] In certain cases the lines in which the sleepers were laid were changed over from main lines to sidings during the course of the tests and she life of the sleepers concerned has therefore been somewhat prolonged. [...] that of the Powellised sleepers placed in the Karachi division of the North Western Railway the sleepers were removed from the main line and placed in a goods yard. [...]...... 8 The failure of the two Dipterocarpece with each of the preservatives is interesting and is explained by the low absorption in the case of the Carbolineum Avenarius and the leaching out of the Zinc Chloride in the second case. [...] The leaching out of the preservative also explains the failure with the other 3 species in the case of the second preservative.