mOCEEDlNGS OF THE THIRD ENTOMOLOGICAL MEETING 



705 



36.— THE PRESERVATION OF WOOD AGAINST TERMITES. 



By T. Bainbrigge Fletcher and C. C. Ghosh. 

 During the last eight years we have made numerous tests of various 

 proprietary preservatives advertised for use in India as protective to 

 wood Uable to attack by Termites. The following tables show the 

 results : — 



Creosote. 



The great difference in effect of application of an incomplete treatment in cold creosote (28 months) 

 and a complete treatment in hot creosote (more than 81 months) is evident from the above. Wood to 

 be properly treated with creosote should be immersed in a tank or other receptacle heated to 80° to 

 90° C. and allowed to cool down gradually. The cost of treatment is relatively high, owing to the large 

 amount of creosote absorbed, but it is better to have a large degree of absorption if more than relatively 

 temporary protection is desired. For outdoor purposes, where long endurance is required under under- 

 ground conditions, thorough impregnation with creosote is hkely to yield good results. 



Carholineum. 



Date 

 buried 



Date found Period 



eaten i (months) 



Mango 

 Teak 



Mango, 

 •Deodar 

 and 

 Peal. 



Painted with as 

 much cold Carholi- 

 neum as could be 

 soaked up by dry 

 wood. 



Do. 



Do. 



Do. 



Do. 



Dipped half-way 

 into cold Carholi- 

 neum and allowed 

 to soak maximum 

 amount. 

 Do. 



Do. 



21st Oct. 1911 



Do. 

 Do. 

 Do. 

 Do. 



Do. 

 Do. 

 Do. 



11th April 1916 



t2 



