588 



HOETICULTURE 



Ottob«c 26, 1913 



IroD Framer at the Waban Rose Conservatory, Natick, Mass. 



The R 

 to G 



of Light 

 Cultare 



Being exlracli from a series of experiments made by the 

 Mass. Agricultural Experiment Station. 



IN July, The Mass. Asricultural Experiment Station published a Bulletin making 

 for the first time public — the results of a series of exhaustive experiments con- 

 ducted by them for the past few years. 

 Many of the results are so intensely vital to greenhouse owners and prospective builders, 

 that we have made selections here and there from the text and are giving them below. 



1. Lack of light is responsible for many greenhouse diseases. 



2. The old type of greenhouse was crude in construction, especially as regards 

 light. The modem tendency is to build larger houses; to use stronger material, 

 casting less shade; and to use larger and better quality glass. 



3. Large houses can be constructed relatively more cheaply and managed more 

 easily because there is a less rapid change of atmospheric conditions, etc. This 

 helps to eliminate many greenhouse troubles. 



4. Morning light is more intense than afternoon light, our experiments showing 

 a difference of 10 per cent, and ranging as high as 30 per cent for some houses. 



5. The location of a house as regards points of the compass has a bearing on 

 the practice of syringing plants, the yield of the crop, and to a certain extent 

 on fun.(;us infection. 



6. To obtain the best results in a house running East and West, the house 

 should be from 15 to 30 degrees North of East. This enables the plant to take 

 advantage of the more intense morning light and the crop can be syringed with 

 less danger from infection. 



7. There appear to be no important differences in the light In a greenhouse at 

 different distances from the glass, practically the same light being obtained at 

 5 feet as at 30 feet. 



The Experiment Station Bulletin contains over forty pages devoted to the subject. 

 You should read it from cover to cover. 



The Elxperiment Station has just written us that they will be very glad to aaail 

 copies of the Bulletin to all who may write for them. 



Lord amidl Biuirolhiainni Compainy 



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