THE NEW ENGLAND STATES. 55 



NEW HAMPSHIRE. 

 LONDONDERRY SPRING. 



Misc. Div. No. 2173. 



Gases. 1 



cc 



Carbon dioxid (free) 5.7 



Carbon dioxid (set free from bicarbonate upon evaporating to dryness) 5. 3 



Hydrogen sulphid 



Sanitary analysis. 



Parts per million. 



Ammonia, free 0. 012 



Ammonia albuminoid 052 



Nitrogen as nitrites V. ft. tr. 



Nitrogen as nitrates Trace. 



Oxygen required 1. 50 



Bacteriological data: 



Organisms per cc on plain agar after 48 hours at 37 C 3 



Organisms per cc on neutral red agar after 48 hours at 37 C 1 



Gas-forming organisms in 5 cc 



Gas-forming organisms in 1 cc 



Gas-forming organisms in 0. 1 cc 



Gas-forming organisms in 0.01 cc 



The Londonderry Spring is situated at Londonderry, Rocking- 

 ham County, N. H., and is owned and operated by the Londonderry 

 Spring Water Co., of Nashua, N. H., large quantities of the water being 

 bottled for sale. The spring was inspected on November 29, 1907, 

 samples directly from source being obtained for examination. The 

 flow was approximately 10 gallons per minute, with a temperature of 

 46 F. Chemical analysis shows this to be a lightly mineralized, cal- 

 cic, sodic, bicarbonated water of the alkaline type. The hypo- 

 thetical combination indicates that approximately 55 per cent of the 

 total salts in solution are in the form of the bicarbonates of calcium 

 and magnesium, with 12 per cent of sulphate of sodium, and a smaller 

 amount of sulphate of magnesium. The sanitary analysis shows a 

 small amount of free ammonia, considerable albuminoid ammonia, 

 and very faint traces of nitrites. The bacterial count was very low, 

 and an inspection of the premises failed to reveal any probable sources 

 of pollution. The analysis made by this bureau differs very materially 

 from the advertised analysis, which does not represent the constitu- 

 ents found in the natural water. 



1 At C. and 700 inin pressure in 1,000 cc of water. 



