89 
few interesting points have been demonstrated. Unfor- 
tunately during the time at our disposal (which was a period 
of about 3 weeks, during a holiday), the lake never really be- 
came satisfactorily polluted. There was only one heavy 
shower, and this, although it was sufficient to add a consid- 
erable quantity of pollution, was not enough to wash the con- 
tamination from a very large area into the lake. Conse- 
quently judging the water from the point of view of lactose 
fermenters, the contamination was probably very little else 
than cowdung from the immediate surroundings of the lake. 
Table No. VIII(d) gives the analysis of water before and 
TABLE VIII (0) 
RED HILts, SURFACE.—20-9-II. 









Glucose. | Lactose. BIS) 2) ei} |e) Name 
5 /8| 8 lS ly (Ste OT 
o\3 BSE ies ec Re Number. 
I 20 1 | Nil Tr 1A |< fs > I IG 
2 Io 2|Nil SS —— ied Rok Be! -———_—__ —_—_ ——_—_—_- 
3 5 3 | Nil 7 betel bel] Mesiculosus, 
3 I 3 | Nil > bl — | |p Sp Lk ee 
3 “Tl 3 Nil Wiha 3 3 |—|—|-|—|—-|+]-—]| Vesiculosus. 
3 “O05 3 | Nay 1 2 4 |—|—l-j-|—I+|- Do. 
3 ‘03 Nil 3 Nil 3 5 |+/—-[-|-| -|+|- Coscoroba. 
3 ae Nil | 3 | Ni! 3 Ge ee ae) 2 Vesicles: 
3 "005 Nil 3 Nil 3 7 1—|-|-|-|- +)— Do. 
3 "003 | Nal 3 | Nw) 3 8 |—|—}-J] —I—- [+I - Do. 
3 ‘oor | Nzl} 3 IN| 3 9 |+/—|—|—|+|—| —| Cloace. 
"05 § 10 |j—|—j—!)—’-]- — | Vesiculosus. 
Prior to pollution. 
Note.—High glucose line due to great numbers of Bacillus P. and few 
lactose fermenters most of which are vesiculosus. 
RED Hitts, SURFACE —-21-0-11- 















Glucose. | Lactose. 8/9 i2] al af Name 
tives Oise lool | Number. 
: 20 | 1 | Nal} -x | Nil SIA \z hab Lets 
2 IO 2 | Nil 2 | Na Ms (RE Pa SOR Se Fy ps 
3 5 3 | Nay 3 | Nal 1 |—|—|—|—|—|—|—| Mutabilis. 
3 I 3 Nil 3 | Nal PW oe bod boa Med Gora ae oda OF 
3 an 3 | Nia} 3 | Nil} 3 |-|—|-|—|—-|+|-| Vesiculosus. 
3 05 3 | Nat 3 | Nal 4 \+}+ Sra aa bey eat ? 
3 apg (AEE E aes: I 5 |+)/—|—-|-|—|-|-|r11. 
3 ‘OP, feo Nil} 1 2 6.) )— —|—|+ —| Vesiculosus. 
.3 -oo5 |Niwly 3] Nw) 3 V4 a am an —|+-i— Do. 
3 003 | Nw) 3 Nw) 3) 8 |—|—|-|-|-|+4+/-| Do. 
3... ‘oor [Nit] 3bNHi 3| 9 |-|-|-|-|-]4|-| Do. 
‘OI °03.-—« 10: |+/—|—i—)—!+)|—| Coscoroba. 
Rain actually falling. 
_ Note.—Increase in numbers of both classes and nearness of acid and gas 
lime in both broths. 
