STXA WBERRIES STRUCTURES FOR FORCING. 



237 



frames, with the leaves just clear of the glass. The lights need only be used in the 

 case of heavy rains or snow, then tilted top and bottom. All that is wanted is pro- 

 tection from heavy rains, snow, and severe frost complete rest without drought. 

 Therefore withdraw the lights whenever the weather is favourable. The site for the 

 frames must receive all the light possible. Plants for second early forcing should be 

 treated similarly. Midseason and late plants may remain outside, placing ashes 



D 



Pig. 58. SPAN, THBEE-QITABTEES SPAN, AND LEAN TO STBAWBEBEY HOUSES. (Scale : -fg inch = 1 foot.) 

 References : D, span-roofed house : /, temporary stage, resting on brickwork ; rj, shelves 5J inches broad and 

 1J inch thick; h, top lights ; )', side lights; j, trellis; k, beds; I, 4-inch hot-water pipes; TO, hot-air chamber; 

 n, path ; o, water trough formed of cement, and covered with an iron grating. E, three-quarters span-roofed house : 

 p, movable stage ; 7, shelves ; r, lifting top ventilators ; s, front lights ; t, 4-inch hot-water pipes ; u, bed ; v, hot- 

 air chamber ; w, pathway. Dotted outlines, lean-to house: x, back wall; y, top roof lights; ~, pathway ; a, stage; 

 6, shelves ; c, front shelf. Another arrangement and better : continue the stage p and shelves q two tiers higher, 

 omit the stage a and shelves b, c, and q, and have the pathway at w ; other arrangements the same as for the 

 three-quarters span-roof house. The loan-to is then available for melons after forcing strawberries. 



around the pots and over the rims. In severe weather they can be protected with a 

 little dry soft straw, removing it after the frost has gone. 



Structures. These must be light, well-ventilated, and with sufficient hot-water 

 pipes to maintain a temperature of 70 to 75 without hard firing. The plants should 

 be near the glass, yet not touching it. Shelves are provided in vineries, peacheries, 

 and other structures at the sides, backs, and suspended from the roof over the paths or 

 where convenient for watering. Millions of plants are annually forced by such means, 

 but it is usual in large establishments to devote separate structures to forcing this fruit. 



