AERIAL RAILWAY ERECTED ON THE LOVAT ESTATE. 131 



to the upper terminal. The weight of the load does not exceed 

 22 cwts,, and although it is possible to send down rough logs the 

 work is confined to the transport of sawn timber of different sizes. 



As already stated, the trestles (Fig. 4) vary in height from 25 

 to 60 feet, all the main beams being in one length set in concrete. 

 The main timbers vary from 9 to 1 1 inches square ; ties and 

 braces from 6 to 9 inches by 3 inches; top bearers 10 by 

 6 inches. The timbers are of Scots pine, as it was calculated 

 that the life of this timber would be sufficient to see the whole of 

 the manufactured wood in Farley Forest removed. This has 

 proved to be correct. To meet the requirements of the Board 

 of Trade, guards had to be erected over the public roads. 



The system is known as the fixed rope system. There is 

 another with one continuous running rope to which carriers are 

 affixed and are conveyed by the motion of the rope. 



For the purpose of signalling, and regulating the transport of 

 timber from terminal to terminal, a telephone is employed. 



As the upper sawmill is situated about a mile from the upper 

 terminal, a light railway (Plate XIII. Fig. 5) conveys all the 

 manufactured timber to this point. It is also utilised for 

 conveying rough logs to either of the mills. The railway is 

 made on the general principle employed in woods, viz., with 

 rails of light gauge fixed on light pit sleepers. 



20. Mode of Infection of Larch Canker. 



By Sir John Stirling-Maxwell, Bart. 



The January number of the Quarterly Journal of Forestry 

 contains an article on this subject by Mr W. E. Hiley of the 

 Research Institute, School of Forestry, Oxford, which deserves 

 the attention of Scots foresters, or at least of those who are 

 prepared to believe that the canker fungus found on the dead 

 branches is the same which attacks the living tissue. 



Mr Hiley starts with the assumption (which he undertakes to 

 prove in a future article, but which few foresters will dispute) 

 that the young shoots are not liable to attack until the first 

 year's growth is complete. Next he discusses the various 

 methods of infection to which the shoots may fall victims in their 

 second year, but dismisses such attacks as relatively unimportant, 

 5ince the side branches of the larch die quickly and the main 



