538 Preparatory Operations in the Birmingham Botanic Garden. 



where the soil and situation were suitable for them ; and, where 

 not so, they were detached to a more congenial situation. Single 

 species of some genera were also removed into more suitable 

 soil, until we secured a duplicate plant, which was put in its 

 proper place. 



The plants made but little progress in growth the first sea- 

 sou, but they have grown freely every year since. The whole 

 arboretum is dug over every spring, and kept deeply hoed during 

 summer. The chief nursery plants intermixed were laurels, 

 spruce firs, and free-growing salixes ; and these, whenever they 

 got too close to the specimens, were cut out, so as to allow the 

 specimen plants room, and a free circulation of air on every 

 side. 



The following are the heights attained by a few of the trees, 

 by actual measurement : — 



J v cer saccharinum - 

 /datanoides crispa 

 Pseudo-Platanus 

 Robim'a procera ( Pseud- Jcacia 



procera Arb. Brit.') 

 macracantha (R. V.-A. ma- 

 cracantha Arb. Brit.) 

 Pyrus orientalis (P. communis sa- 



licifolia Arb. Brit.) 

 salicifblia (P. com. salicifolia 



Arb. Biit.) 

 A^v'ia. - 



americana - - 



spuria - 



Praxinus americana latifolia 



oxycarpa (F. excelsior parvi- 



folia oxycarpa Arb. Brit.) 

 simplicifolia (P. ex. hetero- 



phylla Arb. Brit.) - - 

 parvifblia (F. ex. parvifolia 



Arb. Brit.) 

 virens (F. ex. virens Arb.Br.) 13 

 C/'lmus campestris cucullata 

 americana 



scabra (U. montana Arb.Br.) 19 

 macrophylla (U. montana 



major Arb. Brit.) 

 Jetulaefolia ( U. campestris be- 



tulasfolia Arb. Brit.) 

 fulva - 



stricta aspera ( U. campestris 



cornubiensis aspera Arb. 



Biit.) 

 nigra ( U. montana nigra Arb. 



Biit.) - - - 26 



The American ground was also trenched over in the same 

 manner as the arboretum. It had formerly, judging from ap- 

 pearances, been a drained morass, consisting of a close sour 



Feet. 



Feet. 



20 



Quercus Cerris - - 25 



16 



cana (Q. Ce*rris cana Arb. 



22 



Brit.) - - - 10 





^4'lnus glutinosa ^uercifolia - 20 



16 



oblongata - - - 20 





macrocarpa (A. glutinosa ma- 



16 



crocarpa Arb. Brit.) - 19 





Petula alba - - 21 



15 



pubescens (B. alba pubescens 





Arb. Brit.) - - - 20 



12 



angulata - - - 19 



10 



canadensis - - - 23 



14 



verrucosa (B. alba verrucosa 



20 



Arb. Brit.) - - 25 



22 



(Salix alba - - - 27 





nigricans - - - 21 



21 



Russelbawa - - 26 





Populus grisea (P. alba canescens 



17 



hybrida Arb. Brit.) - 26 





monilifera - - - 22 



■ 21 



acerifolia (P. alba canescens 



13 



tfcerifolia Arb. Brit.) - 24 



■ 19 



Hudsoniflwa (P. nigra ietuli- 



■ 18 



folia Arb. Brit.) - - 27 



1 19 



dilatata (P. fastigiata Arb. 



i 



Brit.) - - - 28 



■ 20 



Pinus ponderosa - - 10 





sylvestris - - - 17 



• 17 



Laricio - - - 14 



■ 19 



sylvestris rigensis - - 14 





^4 N bies Douglasfi - - - 14 





excelsa - - - 16 



. 17 



europae^a - - - 21 





americana microcarpa - 16 



