112 TRANSACTIONS OF ROYAL SCOTTISH ARliORICULTURAL SOCIETY. 



subject were numerous, and the grass-effect was uniformly 

 shown in all of them ; and, it should be mentioned, the trees 

 without grass, with which the grassed trees were compared, 

 were grown with trays of sand above their roots, so as to 

 exclude the possibility of explaining the results by the mere 

 presence of the trays. 



The ready oxidisability of the toxic matter formed by grass 

 into some substance which favours plant-growth, will explain 

 the previously observed beneficial effect of grass-leachings in 

 cases where these had been exposed to air, and also why soil 

 taken from grass-grown ground should be more favourable to 

 plant-growth than that from tilled ground. 



Alexander Lauder. 



Collection and Utilisation of Information for 

 A Forest Survey.^ 

 The Board of Agriculture has published Notes on Kerry 

 Woods, by Mr R. L. Robinson, illustrating methods of 

 collecting and utilising information for a forest survey. The 

 introductory section deals with the natural conditions of the 

 locality — topography, climate, geology and soil. This is 

 followed by a description of the methods of measurement, 

 with details of the growth and quality of the timber of larch, 

 Scots pine, spruce and some other species grown as pure 

 crops or in mixture. In the third section, the author treats 

 of the method of arriving at a basis for a survey, and the 

 systematic method of conducting it. There are four appendices, 

 relating respectively to Soil Analysis, Measurements of sample 

 areas, Field Tables for spruce, and Soil Expectation Values for 

 spruce. There are numerous photographic and diagrammatic 

 illustrations. 



International Forest Congress at Paris. 



Under the patronage of the President of the Republic, the 



" Touring-Club de France " is organising a congress to be 



held in Paris from i6th to 20th June 1913, at which will be 



discussed questions relating to all the various branches of 



forestry, especially those which interest the private owner. A 



^ August 191 2. Price 46., post free, 64 pp. 



