106 



MICKO-ORGANISMS IN WATER 



conclusions as to the bacterial condition of the actual 

 source of supply will be arrived at (see p. 62). 



The following table gives the results of examina- 

 tions of the deep-well water obtained from the chalk 

 and supplied to London by the Kent Company during 

 the years 1886, 1887 and 1888 ' :— 



Bacterial Contents of Deep-iuell Water obtained from the Chalk' 

 and su2:)plied to London by the Kent Company (Percy Frankland) 



Number of Micro-orgauisms obtained from 1 c.c. 



WeUs 



1886 



Jan. ' Feb. I Mar. April! May 



Bath Well . 

 Garden Well 



New Well . 

 Supply . . 



Bath Well . \ 

 Garden Well I 

 New Well . 

 Supply . . ; 



— 5^ 



43149 



44* 



38 



47 



101 



June July Aug. Sep. Oct. 



4*i 



39 



12* 



48 



9* 



13 



25 



3* 



160* 

 r283 

 \405 



Nov. 



12 



11 

 .196: 66 



Dec. 



10 



[In those cases marked mth an asterisk the name of the particular well 

 examined was not recorded.] 



1887 



48 

 12 



Bath Well . 



Garden Well' 5 



New Well . 12 



Supply . . , 55 



6 47 



19 



4 



81 



63 



N.B. — The samples referred to as ' supply ' were obtained from the mains in the company's 

 district, and represent not only mixtures of the water from the several wells mentioned in the- 

 table, but also with the water of other similar wells belonging to the company. This water has 

 also passed through the service reservoir, and, as would be anticipated, therefore the numbers- 

 found are often considerably in excess of those discovered in the samples taken directly from the- 

 wells. In nearly all those cases in which larger numbers, such as IGO, 59, 65, 67, &c., were dis- ' 

 covererl in the weU-waters, it was found on inquiry that there had been some irregularity in the 

 work at the well, such as recent repairs, interrupted pumping, &c. 



An artesian well at Mainz was found by Egger to 

 contain four organisms in a c.c. Hueppe found also 

 only four in a deep well attached to a slaughter-house 

 in Wiesbaden, whilst in an investigation of some artesian 



^ Reports to the Local Governinent Board on the Monthly Bacterio* 

 logical Examinations of the London Water Supply, 1886, 1887, 1888,. 

 Percy Frankland ; also Proc. Boy. Soc. 1893, vol. liii. p. 178. 



