CHAPTER XVI. 



THE WALTONIAN CASE. 



Definition. Form. Construction. Capacity. Heating. Lamp. Oil. 



Gas'. Pots. Sand Bottom. Description of Case. Various Sizes. 



Advantages over Hot-bed. How to make a Cutting. Waltonian 

 Principle applied to Wardian Case. 



IGHTLY considered, a Waltonian Case is a 

 drawing-room propagating house. It is 

 not a heated Wardian case, unless 

 we define a Wardian as a par- 

 lor conservatory ; then the 

 Waltonian is a parlor stove or 

 hot-house. Any glass frame or case, 

 in which the air is warmed by the applica- 

 tion of heat, either directly from a lamp, or by means of 

 hot water, would be a Waltonian case. 



The first invention of Mr. Walton, from Avhom the case 

 is named, was placing a tin case, filled with hot water, 

 inside a wooden box, covered with a glass. The air inside 



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