Foreign J^otices — Domestic Jfotices. 235 



pipes, and thence into the reservoir, till all, haA^ing received one change 

 of heat, passes again through the boiler, acquiring a fresh heat, till all 

 is ready boiling. When the fire declines a counter current takes place; 

 the hot water from the reservoir rises to the pipes, where, as it cools, it 

 descends into the boiler, and thence into the bottom of the reservoir, 

 till ail be cool again — having rendered up its heat into the pit or house." 



It can be applied to the heating of pits of every description, as well 

 as green-houses, stoves, Stc. &,c. Engravings are annexed, illustrating 

 the mode of applying this system to the former. 



The proportions for constructing the boilers are also given: they are 

 numbered from 1 to 4. Nos. 1 and 2 have only been tried, and are of 

 the following dimensions: — No. 1, upper diameter, six inches; lower 

 diameter, nine inches; perpendicular height, eighteen inches; thickness 

 of water in boiler, one and a half inch; diameter of communication 

 pipes, one and a quarter inch; diameter of chimney, three inches. 

 No. 2, upper diameter, six inches; Jower do., ten inches; perpendicu- 

 lar, twenty .inches; thickness of water in boiler, one and a half inch; 

 diameter of communication pipes, one and a half inch; diameter of 

 chimney, three and a half inches. No. 1 is probably the smallest size 

 generally serviceable: the whole quantity of water heated is about 

 thirty gallons, and the apparatus of this size will amply suffice for two 

 hundred or two hundred and fifty feet of glass. 



No estimate is given of the probable cost of the apparatus. 



Of the value of this mode compared with that of Mr. Hogg we are 

 not able to state from this description. It is much more complicated, 

 and will, from this circumstance, not be so likely to be adopted. — Cond. 



Art. II. Domestic Notices. 



Mr. Walker's Tulip Show. — The first public tulip show ever made in 

 New England, was to take place just as the present number was going 

 to press, at Mr. Walker's garden, in Roxbury. According to an adver- 

 tisement in the newspapers, we anticipate that amateurs and connois- 

 seurs of this truly magnificent flower will have a fine treat from an in- 

 spection of the bed. We shall endeavor, by all means, to call and see 

 it, and shall probably, in our next, give our readers a more particular 

 account of the same. — Cond. 



Gentikna acaulis. — This lovely little plant has been in bloom, in all 

 its elegance, in our garden, the past month. Three or four of its ultra- 

 marine flowers were expanded at one time, upon a very small plant, 

 presenting to the eye one of the most attractive sights that it has 

 been our pleasure to witness for a long period. Why is it that we do 

 not oftener see it in our gardens? It has not, to our knowledge, flow- 

 ered in the vicinity of Boston, unless at the Botanic Garden at Cam- 

 bridge. In England the plants are extensively used as an edging for the 

 flower borders, where it grows with amazing luxuriance, and throws up 

 its elegant blossoms, excelling in their azure and metallic tint all other blue 

 flowers. G. crinita, with its fringed corolla, is fine, but in color will 

 bear no comparison with the acaulis. It seems to prefer a damp, par- 

 tially shaded situation, not exposed to great variations of heat and dry- 

 ness. In such it is placed in our garden, and although the plants have 



