504 



Messrs. Carnelley and Haldarje. 



Total No. of 

 micro-organ- 

 isms per litre 

 of air. 



_ T 9 



S V© .SJ. /■ \«— \("\ • , y , S , s 



rH <N CO OS NOOjIi rf<00 00 00 

 «H tH CO rH 



Yols. of 

 oxygen re- 

 quired to 

 oxidise the or- 

 ganic matter 

 in 1,000,000 

 vols, of air. 



lO OS 00 rH WlOOJ ^ N H N W5 



OS <N <M CO 05 03 H " lO CO CO CO <M 

 Hri rH 



Yols. C0 2 

 per 10,000 

 vols, of air. 



OitOCO N 00COHJI CO OS N CO 

 00 001> Tfi KMfl I I> ia CD I Tfi 



Temp. F. 



ia OS CO rH N CO N N CO 00 I J> OS 

 W lO lO ift W lO ioio m o 



Approximate 

 height of 

 sewer. 



H|« H|« . H|N ri|«* . iHffl r-l«S> rn|ff> . 



£ J> Hjl . TP t> rff . 1> O "tf • 

 «H rH 



Time. 



5,0 p.m. 

 6.0 „ 

 7.30 „ 



8.30 „ 



10.30 „ 

 11.15 „ 

 12 midnight 

 1.0 A.M. 



5.0 p.m. 

 5.20 „ 

 7.10 „ 

 7.20 „ 

 6.0 „ 



o 



CM 

 I 



OS 



o 



b • o 



1 - 



'£ ""3d 



^ .2 I § g 

 <5 s ^ w 



S g 1 1 'j3 



fa 



2^ 



" 



'35 SS 



■so 



r3 

 -1-3 



os 



iH 



Ja 

 -u 

 00 

 |H 



O fa ^ 



Q 



fiO 



■S g S 



■ri » M ,i fa 

 C f- fH ^ "H 



CCJ c3 C3 

 S S ^ 



ftfiftO 



