148 TRANSACTIONS OF ROYAL SCOTTISH ARBORICULTURAL SOCIETY- 



processes of soil aeration and water percolation taking place. 

 It is worthy of remark that after the nursery at Fordell had been 

 weeded and thoroughly Dutch-hoed, the "purple" spruce 

 responded to this treatment by again reverting to their true 

 colouring and the individual needles regained their erect 

 position, but in the nursery at Fort William the absence of 

 weeds from the untrenched soil was never of sufficient duration 

 to enable such a beneficial reaction to take place. 



Bagley Wood Arboretum. 



An arboretum devoted to conifers was started in 192 1 in 

 Bagley Wood, Oxford, in connection with the School of Forestry 

 there. Many of the plants suffered from the abnormal drought 

 of that year, and some of them succumbed. Nevertheless 

 the survivals, together with subsequent additions, now form 

 an interesting and promising collection. A complete list of 

 species now in the arboretum is given below, and it will be 

 seen that there are several important conifers not represented, 

 such as Finns CouKeri, P. Lambertiana, Abies amabilis^ Picea 

 pu?ige7is^ and many others. It is possible that members of 

 the Society and others may have young plants of species not 

 included in the list, which they could spare, and would be 

 prepared to present to the arboretum. If so these plants (in 

 any number from one to six of a kind) will be gratefully 

 accepted if despatched to the Professor of Forestry, Oxford. 



LIST OF SPECIES ALREADY IM THE BAGLEY WOOD ARBORETUM. 



Abies balsamea, A. concolor, A. Faxoniana^ A. grandis, A. holo- 

 phylla^ A. nobilis, A. Nordj/ianfiiana^ A. pectinata, A. Pindrow^ 

 A. Pi?isapo, A. recumata, A. umbellata^ A. Veitchii. 



Cedrus atlan/ica, C. Deodara. 



Cryptomeria japonica. 



Cupressus arizonica^ C. lusitanica var. Benthami {C. K^iightiana)^ 

 C.fufiebris, C. Goveniana, C. macrocarpa, C. ?mfkate?isis, C. 

 obtusa, C. se?npervirens, C. se?npervirens var. horizo7italis. 



Libocedrus decurrens. 



Larix europea^ L. lepfoiepis, L. Pri?icipis Rupprechtii. 



Picea alba., P. asperata, P. asperaia var. ponderosa, P. exce/sa, 



