76 GARDENING FOE PROFIT. 



and water gets in, and not only loosens the glass, but 

 rots the bar as well. A most simple plan to obviate this 

 is to pour along the junction of the bar with the glass 

 a thin line of white lead in oil, over which is shaken dry 

 white sand. This hardens and makes a cement that 

 effectually checks all leakage. It is quickly done. The 

 engraving, figure 11, shows how the portable sash is held 

 and the application made from the oil-can containing the 

 thin white lead. I have seen glass so cemented that has 

 stood for ten years still in perfect order, and it looked as 

 if it would stand for ten years more without further re- 

 pair. This plan, which is but little known as yet, is of 

 the greatest importance. Had I known of it thirty years 

 ago, I would have saved many thousands of dollars in re- 

 pairing, besides having the plants under this water-tight 

 glazing in better condition. 



It will be seen that two of the hot water pipes are 

 placed under the front bench. The other four are placed 

 two on each walk. The front bench, four feet wide, is 

 constructed so that it will hold five or six inches in depth 

 of soil ; but the middle or main bench, which is thirteen 

 feet wide, requires to be walled up to a height of two feet 

 (see plan) and filled up to the top with soil. The soil 

 best fitted for the growing of Lettuce is five parts good, 

 strong, fresh loam to one part well-rotted cow dung. I 

 will give, as nearly as I can, our manner of operating. 

 The first sowing of Lettuce (which is mainly the Boston 

 Market variety), made in the open ground about the 20th 

 of August, will be large enough to be set in the green- 

 house benches (at six or seven inches apart each way), by 

 the 20th of September, and will without fire heat give 

 fine heads by the first of November. For the second 

 succession, sowings are still made outside about the 20th 

 of September, to replant the space where the first crop 

 has been cut out by the first week in November. As the 

 season is now getting colder the crop planted by the first 



