214 GARDENING FOR PLEASURE. 



of lime whitewash made very thin. This makes a suffi- 

 cient shade, and is gradually dissolved by the rains, so that 

 by autumn the coating is removed, or so nearly so that 

 what remains may be readily washed off. A more pleasant 

 effect is produced by spattering the glass with a prepara- 

 tion of naphtha and white lead, made so thin as to resem- 

 ble skimmed milk. This can be put on by a syringe at a 

 cost not to exceed twenty-five cents for every thousand 

 square feet of glass. It is best to put it on gradually, be- 

 ginning in May by lightly covering the glass in numer- 

 ous fine drops, like rain drops, and increasing its thickness 

 as the season advances. 



Whatever may be the means of effecting it, we find 

 that in this latitude shading of some kind is required 

 from about the first of May to the middle of September 

 by nearly all plants grown under glass. Ferns, Lycopods, 

 Caladiums, Primulas, Fuchsias, Begonias, Gloxinias, 

 Achimenes, Lobelias, Smilax, and plants of that charac- 

 ter require the glass to be heavily shaded, while Roses, 

 Carnations, Bouvardias, Poinsettias, Geraniums of all 

 kinds, and nearly all succulent plants, do not need so 

 much. The method of spattering the glass outside with 

 the preparation of naphtha and white lead, allows the 

 shading to be light or heavy, as required. When first 

 done, it is spattered very thinly, merely to break the 

 strong glare of the sun, just about thick enough to half 

 cover the surface. As the season advances, the spatter- 

 ing should be repeated to increase the shade, but at no 

 time for the plants last mentioned do we entirely cover 

 the glass. In Fjugland, especially for Fern houses, 

 Brunswick green mixed with milk is used, to give a 

 green shade, which is thought to be best suited to these 

 plants. The blue glass for greenhouses which was so 

 highly lauded a few years ago has not met with much 

 favor ; but recent experiments in glazing with ground 

 glass have given such results as to warrant the use of it 



