538 Douhle-ronfed Hot-houses. 



JFi'er. 86. Side view of the same. 



Fig. 87. Section on the ine a b. 



In England, and in the soutliern parts of the Continent, it 

 is probable that tiiis method could not be employed with so 

 much advantage as in Germany or Russia; but in more 

 northern climates it deserves some attcution ; and there is no 

 doubt that, as it becomes more general, other improvements 

 will suggest themselves. As I do not fmd this plan men- 

 tioned in any work on gardening, I have transmitted the 

 present description of it, accompanied by a sketch for your 

 inspection. 



I am, Sir, yours, &c. 

 Mai/y 1832. Charles Raucii. 



