84 VEGETABLE GARDENING. 



lins and posts, gas pipe can be used to good advantage. It is 

 cheap and durable. 



(12) All joints should be painted beiore being put together; 

 all wood and iron work should be kept well painted. 



(13) If putty is used in glazing the glass it should be 

 bedded in it and nailed in, in this way: paint the sash bars, 

 then run a thin coat of putty along them; bed the glass in it 

 commencing at the bottom of the sash and lapping the glass one- 

 fourth of an inch, on the same plan that shingles are laid on a 

 roof. Fasten the glass with round three-CLuarter inch brads, us- 

 ing four to each glass; put more liquid putty along the glass 

 next to the sash bars and smooth it off with a knife even with 

 the glass. 



(14) Liquid putty is made by mixing one-third boiled lin- 

 seed oil, one-third white lead and one-third common putty. If 

 too thick, as may be the case in cold weather, add a little tur- 

 pentine or benzine. It may be applied with a brush but the best 

 way is to put it on with a bulb bought for the purpose; or a bulb 

 may be made with leather, having a large quill through which to 

 squeeze the putty. In the latter case there must be a hole in 

 the side or end by which the bulb is filled and which may be 

 drawn together by a string. 



(15) Perhaps the most popular way of setting glass in 

 greenhouses at present is by using square glass and butting the 

 ends together. To do this to t^st advantage no nails or putty 

 are used and a special wooden «cap is put on the sash bar which 

 holds the glass in place. If desired to have the glass tight the 

 abutting edges may be just touched with white lead before being 

 put together. This makes a very satisfactory roof. 



QUESTIONS— CHAPTER VI. 



1. Discuss the use and construction of a cold frame. 



2. Discuss the use and construction of a hot-bed. 



3. Discuss the use and construction of a fire hot-bed. 



4. Discuss the use and construction of a green-house. 



5. How should the ventilation and temperature be regulated for 

 plants grown under glass? 



6. Tlow should plants be watered? 



7. What kind of soil is best for plants growing under glass? 



8. Wliar is a good method of starting plants in a grepu-hotise ? 



9. What may be substituted for glass on hot-bed sashes? 



10. Name ten important things to be remembered in building glass 

 houses for plants. 



