252 THE FLORIST AND 



Now, it appears to me that a small machine which can exhaust the air in 

 the manner just described, might, by a little ingenuity, be so contrived as 

 to produce a circulation of air in our hot-houses at a time when it would be 

 unsafe to ventilate, and I think it not unlikely that after we have become 

 more alive to the advantages which vegetation derives from a circulation of 

 heated fresh air, some such machine as the one I have noticed will be looked 

 upon as a necessary appendage to our pits and early forcing-houses. At 

 present Haig's invention may be considered a move in the right direction, 

 and as it is capable of being easily fitted to hot-houses or pits at a trifling 

 expense, I trust the preceding remarks may induce some of our leading hor- 

 ticulturalists to give it a fair trial, and favor us with the results. 



W. B. B. 

 [In Gardeners' Chronicle, 



THE ROSE. 



BY JOHN A. KENNICOTT, M. D. 



June is the old month of roses, and we write of this Queen of flowers in 

 the season of June roses, with fields of them blooming around us and the 

 memory going back to a time within this century, when in the best gardens 

 west of tide water, there were but the old Cinnamon — the " Damask," or 

 Light Blush of recent catalogues, (now only fit to feed rosebugs) — the Tall 

 White and the Med, (probably the York and the Lancaster — and now and 

 then, outside the garden, and clump of Sweet Briar — the only one not 

 fallen into barrenness or decrepitude — though the old white is still a great 

 favorite with old fashioned people, and the old Red blooms as showily as 

 ever. 



At the present time the Rose Catalogue enumerates sorts by the thou- 

 sands, and of all colors, except blue, and of all habits of growth, from the 

 dwarf of a few inches, to the climber, making shoots of twenty feet in sea- 

 son. Nor is this all ; instead of being confined to the first summer month, 

 we have them in bloom, in the open border, as far north as the great Lakes, 

 from the end of May to the beginning of December, and at the Southern 

 extremity of the Union during every month of the year. 



The species of the genus Rosa are not very numerous — though the varie- 

 ties from seed and the occasional " sports" are endless. Cross breeding 

 and hybridizing giving the greatest results ; and high culture and judicious 

 protection perfecting the product of nature and art. 



The commercial or professional classification of roses is somewhat arbi- 

 trary ; and far from clear or definite. The first, and still the most common 



