J 54 



Management of Hothouse Flues. 



green-house, and supply them occasionally with water, con- 

 taining liquid manure, composed of soap-suds, and other mat- 

 ters, which I find of great service to the plants. 



Cinerarias treated in this way begin to flower in December, 

 and continue increasing in size and beauty for several months, 

 until their corymbs reach a foot or eighteen inches in diameter. 

 Such varieties of C. cruenta as I think worth preserving for 

 more than one season, I cut down about the end of May, and 

 place the pots on a dry shelf in the green-house, supplying 

 them very sparingly with water. About the first of August I 

 re-pot them, dividing the roots, and treating them in other re- 

 spects as I do seedling plants, but they rarely reach the size 

 they do the first year from seeds. 



The other green-house species of cineraria I cultivate are 



lanata (Jig. 49. a), hybrida, geifolia(6), and amelJoides(c) : 



these I increase by 



cuttings, planted 



about midsummer, 



and treated in other 



respects as cruenta, 



my object being to 



have a few plants of 



each in flower with 



the latter. To have 



them in perfection, 



they should not be 



more than one year 



old ; and they do not 



require pots more than half the 



With hearty wishes for the success of the Gardener's Maga- 

 zine, which is a great treat to persons situated as I am, in re- 

 mote parts of the country, I am, Sir, &c. 



James Drummond. 



Cork Botanic Garden, Oct. 18- 1826. 



size of seedling cruentas. 



Art. VIII. On the Plan of closing the Smoke Flues of Hot- 

 houses and other Buildings that are heated only in the Day-, 

 time, for the Purpose of preserving a Warm Temperature 

 during the Night, fyc. By Mr. William Flavel, Iron- 

 monger, Leamington Spa. 



Sir, 

 Your Magazine (vol. i. p. 430.) contains some remarks on 

 a paper by the Reverend George Swayne " On the Manage- 



