BACTERIAL CONTENTS OF VARIOUS WATERS 111 



found 1 on July 6, 1892, by one of us to contain 74 in 

 1 c.c. 



The Loch of Lintrathen, 2 which lies at the foot of 

 the Grampians, and supplies the greater portion of 

 Dundee, when examined from the service pipe in 

 this city, was found to yield the following numbers : 



Bacterial Contents of Loch of Lintrathen Water supplying Dundee 

 (Percy Frankland) 



Number of Micro-organisms obtained from 

 Date of Collection 1 c.c. of water 



June 22, 1892 110 



23 149 



30 



July 2 

 4 



21 



29 



Oct. 18 



290 



94 



114 



279 



177 



77 



155 



260 



Thus the Loch of Lintrathen, taking the average of 

 the examinations made, contains 170 micro-organisms 

 in a c.c. 



More recently we have examined the water just as 

 it issued from the Loch itself, and found (June 10, 

 1893) 30 bacteria per c.c. On the other hand, a 

 sample taken on the same day near the shore, and just 

 where a large quantity of algse were suspended in the 

 water, exhibited as many as 4,000 per c.c. 



The Tegeler Lake, 3 on the other hand, contained an 

 average of from 127 to 890 in a c.c. when examined 

 from June 1885 to April 1886. 



Breunig found in the Schulensee, which is an ex- 

 pansion of the river Eider, 874, 772, and 760 micro- 

 organisms in a c.c. 



1 Percy Frankland. Proc. Roy. Society, 1893, vol. liii. p. 225. 



2 Ibid. 



3 ' Bericht liber die Untersuchung des Berliner Leitungswassers. 

 Plagge und Proskauer, Zeitschrift fiir Hygiene, vol. ii. p. 401. 



