sot Hwticultural Society. 



rection of the intelligent and indefatigable secretary, Mr. Sa- 

 bine ; next to whom, we must not forget, in their different 

 departments, Messrs. Lindley and Monroe. In our opinion, 

 that richly-endowed establishment cannot be confided to abler 

 or more competent agents, as well in regard to the application 

 of its treasures, as a judicious management of the collection." 

 We are glad to transcribe this testimony as conveying our 

 own sentiments. Dendrobiimi squalens, " terrestre bulbis co- 

 nicis truncatis, floribus resupinatis confertis, foliis lanceolatis 

 plicatis subtrinervibus scapo duplo longioribus. Lindley MSS." 

 Sent to England from Rio de Janeiro by Mr. Forbes, a col- 

 lector in the service of the Horticultural Society. Lobelia 

 campamdoides, newly introduced from China. Thunberg in 

 Linn. Trans, ii. 332. DiancUa longifolia, Brown's Prodr. i. 

 2S0, now first figured. Gardenia amcena, lately figured in Bot. 

 Mag. Erythrina caffra, Thunb. Prodr. Passijtora herber- 

 tiana, with an appropriate specific character of six lines, too 

 long for us to transcribe. Edwardsia chrysoj^hylla, Linn. Trans, 

 ix, 299. Rosa invobwvata of Mr. Linclley's Monograph. 



PI. T^O. Nemophila jihacelioides. Bignonia ccquinoctialis (5. 

 given as a separate species, Chamberlaynii in Bot. Mag. Eu- 

 lophia gracilis, " scapo gracillimo, foliis lanceolatis trinerviis 

 triplo longiore, calcare clavato, labelli lobo medio obsoleto. 

 Lindhy's MSS." In the garden of the LTorticultural Society, 

 sent from Sierra Leone last year by Mr. G. Don. Phaseolus 

 semierectns. Calceolaria intcgrifolia. IsGchilus linearis. la- 

 tropha gossypifolia, Tritonia Jtava ,- recorded by Dr. So- 

 lander in Hortus Keisensis under Gladiolus, "from which genus 

 it was detached by us *, in the treatise on Ensatae in the Annals 

 of Botany, i. 219." 



LXIV. Proceedings of Learned Societies. 



HORTICULTURAL SOCIETY OF LONDON. 



Oct. 7. — THE following communications were made : 

 On the Form and Materials for Rafters and Bars for the 

 Roofs of Hot-houses, &c. ; by Mr. Thomas Tredgold, Civil 

 Engineer. 



The rafter proposed by Mr. Tredgold is of iron with a 

 casing of wood, the advantage of which is, that its dimensions 

 may be much smaller than if made wholly of wood ; and tlie 

 objection to iron rafters or bars is effectually remedied, namely, 

 the facility which they give to the escape of caloric. Mr, 



* Ensataruni Ordo, autore Joh. Bellenden Gawlcr, armigcro. 



Tredgold 



I 



