THE NEW ENGLAND STATES. 83 



MASSACHUSETTS. 



KOBBINS SPRING. 



Misc. Div. No. 4714. 



Gases. 1 



cc 



Carbon dioxid (free) 8. 4 



Carbon dioxid (set free from bicarbonate upon evaporating to dryness) 3. 9 



Hydrogen sulphid 



Sanitary analysis. 



Parts per million. 



Ammonia, free Trace. 



Ammonia albuminoid- 0. 07 



Nitrogen as nitrites 00 



Nitrogen as nitrates 1. 40 



Oxygen required 19 



Bacteriological data: 



Organisms per cc on plain agar after 48 hours at 37 C 2 



Organisms per cc on neutral red agar after 48 hours at 37 C 2 



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 



Robbins Spring is situated at Arlington Heights, Middlesex 

 County, Mass., and is owned and operated by Eobbins Spring Water 

 Co. It was inspected November 30, 1907, samples directly from 

 source being obtained for the purpose of examination. The flow 

 was approximately 5 gallons per minute, with a temperature of 

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

 calcic, sodic, bicarbonated, sulphated, muriated, nitrated water of 

 the alkaline-saline type. The hypothetical combination indicates 

 that approximately 39 per cent of the salts in solution are in the form 

 of the bicarbonates of calcium and magnesium, with 12 per cent of 

 sodium nitrate, 14 per cent of sodium chlorid, and 16 per cent of mag- 

 nesium sulphate. The sanitary analysis shows traces of free ammonia, 

 a small amount of albuminoid ammonia, and considerable nitrate; the 

 bacterial count, however, is low and inspection of the premises failed 

 to reveal any probable sources of pollution. No advertised chemical 

 analysis of the water could be obtained for the purpose of comparison. 



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





