The Canadian Horticulturist. 



367 



THE MASON EVAPORATOR. 



N compliance with your request, I herewith submit a description of the 

 Mason evaporator, made from memory. Size, 4x7x7 feet to eaves » 

 frame made in three sections of 2x2 lumber, one at each end and one 

 in the middle. I enclose the whole of one end with matched stuff, 

 allowing the centre piece or board to extend one foot above the peak ; 

 cover the other end same way or within thirty to thirty-two inches of 

 ground, that is the width of a piece of sheet iron. On the side, board to 

 within four inches of the ground ; this space is left on both sides for ventilation 





Fu;. 60.— Til K Mason Evapor.\tok. 



and draft of outside air. Slides for two single trays are made in this space 

 under the heater. If draft of cold air is too strong, a strip of board is set 

 against the opening on the windward side. The other side has first a six ,or 



