260 TRANSACTIONS OF SCIENTIFIC SECTION. 



tariff policy has to a great extent prevented competition 

 from outside, that we are not making the most of onr 

 opportunities to cheapen the cost of manufacturing. 



It might be said here that the Siemens regenerative 

 tank furnace in operation in our city, was the third of 

 this style constructed in this country, and the first em- 

 ployed in the manufacture of bottle glass. At this time 

 there are some six or seven in operation in various parts 

 of this country and the manufacturers using pot fur- 

 naces are beginning to realize the necessity of replacing 

 them with tanks, if they would continue in successful 

 operation. 



To give a faint idea of the quantity of glass bottles 

 used in this country, a certain Boston house, manufac- 

 turers of inks and mucilage, use in their business 

 annually from 75,000 to 80,000 gross of bottles (11,520,- 

 000), while a certain snuff manufacturer uses for pack- 

 ing snuffs some 30,000 gross per year (4,320,000). There 

 are produced annually in the United States some 300,000 

 gross (43,200,000) of fruit jars, used to preserve fruit ; if 

 these jars were placed side by side in a straight line they 

 would reach nearly half way around the earth at the 

 equator. 



The paper was discussed by Mr. Robert Good and 

 Prof. C. B. Warring, the former of whom gave interest- 

 ing reminiscences of many years devoted to manufac- 

 turing glass. 



APRIL 25, 1893-SBVENTH REGULAR MEETING. 



Thirty members and visitors present. 



The annual reports were read by the Chairman, 

 Curator and Librarian respectively. 



The following paper was presented by Prof. James 

 Winne : 



216 



