THE INFLUENCE OF PLANTS IN ROOMS. 



surrounding atmosphere unalloyed oxygen, takes 

 place under the influence of sunlight ; and it will 

 be granted that its hygienic effect will be most 

 potent in the open air or in the sunnier part of a 

 house. Still, the process is not entirely arrested 

 by the absence of sunlight, and its operation so 

 far as its beneficial influence is concerned must 

 be taken in conjunction with the absorption of 

 carbonic acid gas and the resulting respi- 

 ration of oxygen by the hardier Ferns and the 

 sun-loving plants in the sunnier windows of a 

 house. 



It must, however, be conceded that if the sug- 

 gestions in this volume be adopted to the extent 

 the Author would desire, and Ferns are intro- 

 duced into every possible corner of a house, so 

 great an importation of plant life involving pre- 

 sumably a large addition to the previous stock of 

 plants of those householders who, for the first 

 time, carry out the proposals of the Author 

 cannot but exert a very important hygienic in- 

 fluence upon the normal condition of the atmos- 

 phere of a dwelling-house. Will it not, indeed, be 

 admitted, then, that there is an especial reason 



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