in the Arboretum at Derby. 75 



necessarily be soft ; and, therefore, the first step is to render it 

 firm. If very soft, a square of the surface, 1 5 in. on the side, 

 may be rammed so as to lower it 6 in. below the general sur- 

 face ; but, if not very soft, then 3 in. in depth over a square 

 15 in. on the side may be removed, and the bottom of this square 

 rammed so as to lower it 3 in. more; in all 6 in. This square 

 excavation must be beat to a perfect level, and next two bricks 

 are to be laid flat on it, side by side. On the centre of this floor 

 of bricks, the brick tally is to be set; and, if thought necessary, 

 it may be fixed with a little Roman cement. This being done, 

 the surface soil is to be filled in, and closely rammed round the 

 bricks, and over them also, so as to cover them to the depth of 

 3 or 4 inches. The use of the flooring of bricks is to prevent 

 the tally from sinking, or from leaning to one side. The name 

 is printed on a card, and the panel in which it is placed receives 

 previously three coats of paint; and another coat is given to the 

 exterior surface, after the glass is put in and puttied. The cost 

 of the bricks, at Derby, is about Si. per thousand. If the bricks 

 were heated and dipped in oil, or painted with tar or gas liquor, 

 or if they were glazed with the glaze sometimes given to pantiles, 

 their durability would be greatly increased, and the paper card 

 would run less risk of damage from the brick absorbing water 

 from the soil. We have sent one of these tallies to the Hort. 

 Soc, Lawson's Agricultural Museum, Edinburgh, the Adelaide 

 Gallery, the Polytechnic Institution ; and, through the kindness 

 of Mr. Strutt, we have still a few more that we shall be happy to 

 send as specimens, either to individuals or public bodies, who 

 may intend to plant Arboretums or name collections. Such are 

 the permanency of the beauty and instruction, and also the 

 economy in keeping in order, of a collection of trees and shrubs, 

 as compared with the beauty and cost of keeping of a collection 

 of herbaceous plants ; that, when these properties of an arboretum 

 become known, we hope that one will be considered as essential 

 to a gentleman's country residence, as a flower-garden ; and 

 altogether indispensable to a public garden. 



A'bies D. Don excelsa communis Arh. Brit. 6d., ex. Clanbrasiliana Arb. Brit. 

 Ss., alba Michx. 2s, 6d., nigra Ait 2s. 6d., Smithiana Wall. 3s., canadensis L. Is. 66?. 



A^cer L. tataricum L. Is. 6d., spicatum L. Is. 6d., striatum L. Is. 6d,, ma- 

 crophyllum Fursh 2s. 6d., platanoides L. Is., p. Lobelii 5s., p. laciniatum Dec. 

 3s. 6d., sacchiarinum L. Is. 6d., Pseudo-Platanus L. 9d., P. albo variegata Is. 6d., 

 P. purpurea Hort. 2s. 6d., obtusatum Kit. Is. 6d., circinatum Pursh 5s., erioc4r- 

 pum Michx. Is. 6d., rubrum L. Is., monspessulanum L. Is., campestre L. Is., cre- 

 ticum L. Is. 6d. 



Adenocarpus Dec. intermedius Dec. 2s. 6d. 



iE'sculus L. Hippocastanum L. Is., H. variegatum 2s. 6d., (H.) ohioensis 

 Miehx. 2s. dd., (H.) rubicunda Lois. 2s. 6d., (H.) glabra mild. 2s. 6d., (H.) pal- 

 lida mild. 2s. 6d., (H.) Lyonii Hort. 2s. 6d. 



Ailantus Desf. glandulosa Desf. Is. 6d. 



A'lnus Tourn. glutinosa Gmrtn. 9d., g. laciniata fFilld. Is. 6d., g. quercifolia 

 Willd. Is. 6d., g. oxyacanthaefolia Is. 6d., iucana Willd. Is. 6d., cordifolia Lodd. 

 Is. 6d., viridis Dec. Is. 6d. 



