THE NEW ENGLAND STATES. 65 



MASSACHUSETTS. 



SPRINQ. 



Misc. Div. No. 2420. 



Gases. 1 



cc 

 Carbon dioxid (free) ......................................................... 1.7 



Carbon dioxid (set free from bicarbonate upon evaporating to dryness) ............. 9 



Hydrogen sulphid ............................................................ 



Sanitary analysis. 



Parts per million. 

 Ammonia, free ............................................................ Trace. 



Ammonia albuminoid ..................................................... 0. 032 



Nitrogen as nitrites ........................................................ 000 



Nitrogen as nitrates ---- . .................................................... 007 



Oxygen required ................................................................ 



Bacteriological data: 2 



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



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



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 ............................................. 



Ballardvale Spring is situated at Andover, Essex County, Mass., 

 and is owned and operated by the Ballardvale Spring Co. The spring 

 was visited February 11, 1910, samples directly from source being 

 obtained for the examination. The spring has a large flow, but the 

 volume could not be estimated. The temperature is 40 F. The 

 chemical analysis shows this to be a very lightly mineralized, sodic, 

 bicarbonated, muriated water of the alkaline-saline type. The hypo- 

 thetical combination indicates that approximately 36 per cent of the 

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

 magnesium, and sodium, 18 per cent of sodium chlorid, and 9 per 

 cent of sodium sulphate. The sanitary analysis shows a small quan- 

 tity of albuminoid ammonia and a very small amount of nitrates. 

 Inspection of the premises failed to reveal any probable source of 

 pollution. The advertised analysis made in 1898 agrees very closely 

 with the analysis made in this bureau. 



1 At C. and 760 mm pressure in 1,000 cc of water. J No bacteriological sample taken. 

 84644 Bull. 13911 - 5 



