Essential Oils 



All work done in this field has been on the improvement of the dis- 

 tillation process. A new type of continuous operating still has been developed 

 and is undergoing tests at the Southern Research Station, Maple. 



When final tests have been completed, the still will be set up in the 

 Research Reserve near Cochrane for essential oil production. 



Co-operative Research 



The committee for co-ordinated research in the Northern region issued 

 two reports. 



The first was a summary of all projects carried out in 1954 and planned 

 for 1955 by all agencies working in the Northern region. 



The second was the proceedings of a meeting held to determine, from 

 present knowledge, the best management techniques for Clay Belt species, 



SOUTH CENTRAL REGION 

 The study of the silvical characteristics of commercial tree species was 

 continued throughout 1955-56, and the following is a brief outline of the work in 

 progress. 



Regeneration Studies - Swan Lake and Crozier Lake 

 During 1953-54, silvicultural treatments were conducted in the tolerant 

 hardwood stands of the south- central region. This experimental work was 

 designed to assist the re- establishment of yellow birch, a valuable species that 

 does not regenerate satisfactorily after logging. The techniques employed con- 

 sisted of seed bed preparation by scarifying, and the further opening of the crown 

 canopy after logging by the felling or poisoning of defective residual stems. 



The evaluation of this work was continued during 1955-56 within two 

 permanent research reserves - Swan Lake in Algonquin Park and Crozier Lake 

 near the town of Dorset. A series of permanent sample plots were established 



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