80 TRUCK-FARMING AT THE SOUTH. 



A sufficient pitch will be secured to carry off the water, 

 if the back is two feet, and the front one foot high. On 

 each end of the frame a strip should be nailed to retain 

 the two outside sashes in position. Each two sashes 

 should be separated by a half-inch strip, nailed upon a 

 three-inch-wide sliding piece, which latter is let flush 

 into the edge of the back and front, and will leave one 

 and one-fourth inch upon which the sashes are to rest and 

 slide. If a small groove is made along each edge of the 

 middle strip, the water will be carried off more effectu- 

 ally. The drip into the beds is sometimes damaging. 



If the site is exposed to high winds, yellow pine is 

 preferable to white pine for the sash, on account of its 

 greater weight. The sash should be three by six feet, 

 with glass not larger than eight by ten. The smaller the 

 glass the less expensive the breaks. The panes are to be 

 puttied to the sash, and to overlap each other like shin- 

 gles. As dust collects between them and obstructs the 

 light, the laps should not be more than one-fourth of an 

 inch wide. 



COLD FRAMES AND THEIR USES. 



Such is a hot-bed. The site, the frame, and the sash 

 for a cold frame are as above described. The difference 

 between the two is solely, that the former is heated by 

 fermenting material, which creates "bottom heat," while 

 the latter is warmed by the confined heat of the sun alone. 

 For a cold frame, the soil should be elevated six inches 

 above the general level, and finely spaded up and raked. 



Glass is the proper material for sash, and the cheapest 

 in the end. Frames covered with cotton cloth may be 

 used as a substitute, however. To render the cloth more 

 translucent, the following ingredients may be used : one 

 quart pale linseed oil, four ounces resin, and one ounce 

 sugar of lead. The sugar of lead should be ground with 

 a little of the oil, then the remainder of the oil and 



