6 Scientific researches in manufactories. 



that the faculties of discovery, invention, and prac- 

 tical working are very rarely united in one man. 



Scientific investigations however, made in a manu- 

 factory, for the purpose of ascertaining the various 

 sources of loss of materials, the circumstances which 

 affect the amount or quality of the product ; or made 

 with the object of substituting cheaper or more 

 suitable materials, or for varying their proportions, 

 or for many other kindred objects, have in many 

 cases resulted in great benefit to the manufacturer, 

 and have formed the basis of successful patents. 

 Some of the large brewers, chemical manufacturers, 

 candle companies, and many others, constantly 

 employ scientific men in this way to examine their 

 materials, processes and products, and keep them 

 acquainted with the progress of discovery and 

 invention in relation to their own particular trades. 

 No art or manufacture is so perfect as to be 

 exempt from the influence of discovery and inven- 

 tion, and no man can produce so perfect an article 

 but that, by the aid of science, a better may be 

 produced. Science and trade are mutually depen- 



(- dent, without the assistance of science, trade would 

 be unable to supply our daily increasing wants, and 

 without the pecuniary support of trade, science 

 would languish and decay. 



" As long as arts and manufactures are left to be 

 directed and improved by simple experience, their 

 progress is extremely slow, but directly scientific 



/ knowledge is successfully applied to them, they 



