80 JOHN C. H. MINGAYE. 
Results expressed in—Grains per Gallon. Parts per 100000. 
Free Ammonia ... a Ae ‘007 _ ‘010 
Organic Ammonia aye. me 046 of 066 
Nitrogen as Nitrates 
Nitrogen as Nitrites e 
Oxygen absorbed in 15 minutes ‘400 ee “O70 
Oxygen absorbed in 4 hours... 5200 was 7°430 
Total] solids she ie ae OO OOU ... 48-400 
Loss on ignition.. oe ee 5740 A 8-140 
Phosphoric Acids as Phosphates trace ae trace 
‘Chlorine as Chlorides... Kei 3°600 ssh 5140 | 
Norr.—The large amount of albuminoid ammonia as well as 
other impurities present in this water condems it in its present 
state as totally unfit for human consumption. 
(10.) Spring water from Jenolan Caves. 
Total solid matter ... ... %°308 grains per gallon. 
Chlorine in combination ... ‘700 “A 
Free Ammonia ae big 0040 parts per 100,000 
Albuminoid Ammonia ae 0052 is 
Oxygen absorbed in 15 minutes -0008 3 
Oxygen absorbed in 4 hours 0018 ss 
The total solids consist of carbonate of lime, with lesser quanti- 
ties of carbonate of magnesia, silica, chloride of sodium, nitrates 
a trace, etc. An excellent sample of spring water suitable for 
all domestic purposes. 
English Standara of purity of Potable Waters. 
According to Wanklin no exception is taken to a water which 
contains not more than forty grains of total solids per gallon. 
The water as regards organic matter, etc. may be divided into three 
classes :— 
Class I. Waters of extraordinary organic purity, yielding -00 
up to ‘05 parts of albuminoid ammonia per million. This 
class comprises the most carefully distilled waters, deep 
spring waters and such waters as have been filtered through 
a silicated: carbon filter. Waters of this class cannot be 
objected to organically. 
