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THE POPULAR SCIENCE MONTHLY. 



the Jersey glass-houses. New plants have been established in va- 

 rious places, and the capacity of old ones enlarged. At Glass- 

 boro, for instance, one of the oldest glass-houses in the country, 

 the output was recently doubled within a period of three years, 

 and has since gone on steadily increasing. The history of these 

 works is indeed typical. The original glass-house was built in 

 1775 by the Stanger brothers, seven in number, who were all 

 practical glass-blowers. They continued operations with reason- 

 able success until the close of the Revolution, when the works 

 were sold to Colonel Heston, the great-grandfather of the presi- 

 dent of the company now operating the works. It is of interest 



Tank Furnace used in the Manufacture of Lamp Chimneys at Jeannette, Pa. 



that four generations have been connected with the one enter- 

 prise, a somewhat unusual persistency in the history of American 

 industry. In 1887 the enterprise was incorporated as the Whitney 

 Glass Works, and in the following year purchased the works at 

 Camden. These, with the works at Glassboro and Salem, give the 

 company an immense productive power and make their under- 

 taking the most important glass industry in the State and one of 

 the most important in the whole country. This increase of ca- 

 pacity is largely, if not entirely, due to the introduction of im- 

 proved tank furnaces, the invention of the chemist of the Glass- 

 boro Works, Mr. Andrew Ferrari. These are modifications of the 

 Siemens regenerative furnace, but differ from it in having the gas 



