PUBLIC NURSERIES OF THE CITY OF PARIS. 143 



plan. Everybody knows how often they are scattered 

 about without any connexion with each other, and the con- 

 sequent additional expense and trouble. But_, even where 

 the errors of the scattering system are guarded against, 

 there is seldom an effective means of communicating from 

 one to the other without going in the open air. We all 

 know how disagreeable it is to pass from a moist stove 

 to frosty air — from wet gusts to damp greenhouses ; it is 

 dangerous to tender plants that often have to undergo it 

 unclothed ; nor can it be otherwise than injurious to the 



Fm. 51. 



Glass-covered corridor between the plant-houses in the Jardin Fleuriste. 



health of those employed in such structures. All these 

 inconveniences are got rid of by the very simple plan 

 adopted in the case of the group of houses, the arrange- 

 ment of which the following diagram may serve to explain. 

 The plant houses diverge on each side of a glass-covered 

 passage, and there is no necessity for taking the plants into 

 the open air in winter, or for the men who work in the 

 houses to undergo any change of temperature for hours at 

 a time. The houses are so closely arranged together, that 

 heating them becomes much less difficult than when they 

 are separated. The advantages of the plan are so great 

 that I should strongly advise everybody building a batch 



