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Canadian Record of Science. 



the water was collected — say a Winchester quart — to stand 

 some hours undisturbed and then to syphon off the super 

 natant clear water leaving about half an inch between the 

 short end of the syphon and the sediment. This residual 

 water is then well shaken up and with the suspended 

 matter poured into a conical glass capable of holding 

 about 200 or 250 c.c. After again allowing it to stand a 

 few hours, the sediment may be drawn up by a pipette and 

 examined. 



Apart from the time and attention required by this 

 method, it has another objectionable feature ; the current 

 produced by the syphon in action invariably separates a 

 considerable portion of the lighter and more floculent part 

 of the deposit and carries it away. 



The accompanying diagram l illustrates the simple con- 

 trivance the writer has had constructed for collecting and 

 estimating water sediments in connection with the analysis 

 of the Montreal water supply now being made. 



M'N 



♦«►■ 



Fig. 3. 



1 This apparatus is manufactured by Max Kaehler and Martini, Jierlin. 



