SAFETY IN HOUSE-DRAINAGE. 



293 



generally regard all improved methods developed by the applica- 

 tion of scientific principles as dangerous innovations, interfering 

 with the ancient and time-honored traditions of their nnpro- 

 gressive fraternity. 



There is another and a stronger obstacle to scientific progress in 



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sanitary matters. This is to be found in the powerful influence of 

 capital. In our large cities are the extensive wholesale establish- 

 ments of dealers in plumbing fixtures and supplies. The amount 

 of money invested in the stock and patterns for manufactur- 

 ing certain forms of plumbing appliances is enormous. These 

 articles are, many of them, extremely unsanitary and even danger- 



