OCTOBBB 23, 1913. 



The Florists^ Review 



105 



A 1000-POOT L. & B. IRON FRAMER AT THE WABAN ROSE CONSERVATORIES. NATICK, MASS. 



The Relation of Light to Greenhouse Culture. 



(Being axtractB from • seriea of oxperiments made by the Mast. Agricultural Experiment Station.) 



In July The Massachusetts Asrlcultural Experiment Station published a Bulletin makins for the first time public the results 

 of a series of exhaustive experiments conducted by them for the past few years. 



Many of the results are so Intensely vital to sreenhouse owners and prospective builders, that we have made selections here 

 and there from the text and are clvlnB them below: 



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



2. The old type of greenhouse was crude in construction, espe- 

 cially 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 green- 

 house 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. 



6 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 fungous infection. 



7. 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. 



8. 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 40 pa^es devoted to the subject. You should read it from cover to cover. 

 The Experiment Station has just written us thst they will be very glad to mail copies of the Bulletin to all who may write 

 for them. 



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