Domestic Economy. 



305 



Milton Bryant Rectory, Bedfordshire; the Rev.W. Mansfield. (July 12.) — 

 This is an elevated spot, of very limited extent, but containing good distant 

 views, and the space in front of the house is laid out as ornamented lawn 

 with the greatest discrimination and taste. There are more rare and 

 beautiful hardy plants here than at Woburn Abbey, or perhaps even at 

 Ashridge, and more painter-like effect, spirit, liveliness, and sweetness in 

 their distribution, than in any one of the flower-gardens which we have 

 mentioned above. The kitchen-garden is nothing, but the ornamented 

 space in front of the house comes up to our beau ideal for such a spot. 

 Nothing has pleased us so much, since we saw Bromley Hill and Whitmore 

 Lodge. (Vol. III. p. 246.) 



Art. VII. Domestic Economy. 



Artificial Incubation of Chickens or Silkworms. — We have before 

 (Vol. III. p. 429.) alluded to the invention of M. Bonnemain, for the pur- 

 pose of hatching chickens without the help of hens, and we shall now give 

 a more coiltiplete idea of the apparatus, not only because it may be adopted 

 in some poultry establishments, as we think, may be used for hatching silk- 

 worms, and probably for germinating rare seeds or striking cuttings in a glass 

 case, but as furnishing young gardeners of ingenuity with ideas for unfore- 

 seen inventions and applications. The boiler of the apparatus is called a 

 Caiorifere (calor, heat, and fero, to bear), and consists of a small boiler 

 ( ^g. 8 1 . «), a box or building (6) for hatching the eggs, a cage or coop (c) for 



rearing the chickens, tubes (d) for circulating tlie hot water, a supply tube 

 and funnel (e), and a safety tube (/). Supposing the water heated in the 

 boiler, it will rise by its specific levity through the tube a d, move pro- 

 gressively through all the tubes, and return again to the boiler by the tube 

 g, which is inserted in the lid like the other, but passes down to its lower 

 part, (h) This circulatory movement once commenced, continues so long 

 as the water is heated in the boiler, because the temperature is never equal 

 throughout all parts of the apparatus. We may readily conceive that a 

 perfect equality of temperature can never exist, on account of the continual 

 loss of heat which escapes from the exterior of all the tubes. Meanwhile 

 the temperature of the air enclosed in the box differs but little from that of 

 the numerous tubes which traverse it ; and as the bends of the tubes on the 

 Vol. IV. — No. 15. x 



