6 ATMOSPHERIC HEAT OF VINERY. 



atmosphere of the house, and is so far self-acting and 

 regulating, that when the pipes are at the greatest heat, 

 and the house at the highest temperature, it gives off 



FIG. 4. 



STEAMING-TRAT. 



The water flows in the direction indicated by the arrow, ascending by the small 

 pipe A into tray, and by gravitation along the tray from B to C, descend- 

 ing again into main circulation by the other small pipe D. 



the greatest amount of moisture, and vice versd. The 

 ventilator (fig. 5, page 11) is a plan I have devised 

 and used during last winter (1861-62) for letting a 

 constant stream of air into the house, which, before 

 it escapes amongst the foliage of the vines, must of 

 necessity become as hot as the atmosphere of the house. 

 To this mode of admitting a constant stream of air 

 previously heated into our early vinery, I attribute to 

 some extent the extraordinary fine flavour of early 

 grapes we began to cut on the 1st of January 1862. 



With regard to boilers, I think it unnecessary to say 

 much; their name is legion, and many of them are 

 good. My own observation has led me to prefer those 

 that expose the greatest heat -absorbing surface, not 

 under the fire, or by the side of it, but immediately 

 over it, provided always that their construction is such 

 that every portion of their heat-absorbing surface can be 

 swept clear of soot and ashes daily; for if these are 

 allowed to gather on the boiler, they will, as non-con- 



