THE NEW ENGLAND STATES. 89 



MASSACHUSETTS. 



VALPEY SPRING. 



Misc. Div. No. 4834. 



Gases. 1 



cc 



Carbon dioxid (free) 6.7 



Carbon dioxid (set free from bicarbonate upon evaporating to dryness) 2. 2 



Hydrogen sulphid 



Sanitary analysis. 



Parts per million. 



Ammonia, free Trace. 



Ammonia albuminoid 0. 034 



Nitrogen as nitrites Ft. tr. 



Nitrogen as nitrates 2. 00 



Oxygen required 140 



Bacteriological data: 



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



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 



Valpey Spring is situated at Lawrence, Essex County, Mass., and 

 is owned and operated by F. E. Valpey. The spring was visited 

 November 29, 1907, samples directly from source being obtained for 

 examination. The flow was approximately 4 gallons per minute, 

 with a temperature of 47.5 F. Chemical analysis shows this to be 

 a lightly mineralized, calcic, sodic, bicarbonated, nitrated, sulphated, 

 muriated water of the alkaline-saline type. The hypothetical com- 

 bination indicates that of the salts in solution approximately 28 per 

 cent are in the form of bicarbonate of calcium, 21 per cent as sodium 

 nitrate, 7 per cent as magnesium chlorid, 15 per cent as calcium 

 sulphate, and smaller amounts as chlorids of potassium and sodium. 

 The sanitary analysis shows small amounts of albuminoid ammonia, 

 and quite a large amount of nitrates, but a very low bacterial count. 

 Inspection of the premises failed to reveal any probable sources of 

 pollution. No advertised mineral analysis could be obtained for 

 purposes of comparison. 



i At C. and 760 mm pressure iu 1,000 cc of water. 



