TransactioJis of the Prussian Gardening Society. 445 



10. On the Culture of Heaths. — 11. Report on the Gardeners 

 Institution. [See Gard. Mag., Vol. III. p. 93.] 



12. Notice of certain Plantations made at HarbJce. 

 These plantations are of from fifty to seventy years' stand- 

 ing, and some of the trees produce a good many seeds. A 

 purple beech produces 20 lbs. of mast yearly, which sells at 

 2 dollars {9s.) per lb. The tree is nearly 70 ft. high, 2^ ft. in 

 diameter about 1 ft. from the ground, and has been planted 

 57 years. [The high price at which the seeds of the purple 

 beech sell is, probably, on account of its being a fact that 

 about half the seedling plants from the purple-leaved beech 

 will also be purple-leaved. • — J. Z).] A Salisbur/a «dianti- 

 fcMia, of seventy years of age, flowered for the first time sIk 

 years ago; but, of course, only produced male blossoms. It 

 is only about 20 ft. high, and its trunk is not more than 1 ft. 

 in diameter. [It may be worth the recollection of such of our 

 readers as may desire to possess the female Salisbury, that 

 a plant of this sex exists in the king's botanic garden at Kew, 

 and that grafts of it take freely on the male plant. — J. /).] There 

 are specimens of Populus ialsamifera, alba, tremula, nigra, and 

 italica[acladescaZy?wc//.], ninety years of age, from 70 ft. to 80ft. 

 high, with trunks 3 ft. in diameter, which have produced no 

 seed. P. italica [acladesca Lindl.'] grows from 100 ft. to 120 ft. 

 high, and 4, 5, and 6 ft. in diameter. Tilia alba seeds freely, 

 as do a number of other trees. The whole are the property 

 of Count Weltheim, whose grandfather was one of the first to 

 introduce hardy exotic trees and shrubs into Germany, about 

 the middle of the last century. The ground occupied by these 

 trees is upwards of 400 acres, over which they are scattered 

 in the manner of an English park. Harbke is near Helm- 

 stadt, a town in the states of Brunswick ; and we recommend 

 such of our readers as are likely to be in that part of Germany 

 to pay it a visit. 



13. Notes on "what passed at a Meeting of the Society, held April 8. 



1827. 



M. Bosse finds that the germination of seeds is accelerated 

 by moistening them with the malic acid; and also that cover- 

 ing seeds with the pulp of rotten apples causes them to ger- 

 minate sooner than usual. 



14. On the Use of Chloride of Lime in Agriculture. 



Unless spread very thin, it will do harm : spread thin, and 

 intimately mixed with the soil, when the latter is in a dry 

 state, its effects are similar to those of the common carbonate 

 of lime. 



