134 
Analyses characteristic of certain natural conditions in water—concld. 






















ig] | 
(15) SAMPLE I.—FROM THE RUN- | § Ks | 
NING WATER OF THE VAIGAI | @ ( 
RIVER (UNFILTERED WATER)— | 3 | 9 rs] | 
A |°O 4 ea Bacillus. 
2 (oh) a) =] n ‘S] ras 
(a) Total colonies on S 3 a a E = Ss G 
agar at 37°—Count-|— a " 
less. | 
(6) Bile salt lactose, 1) ee a | II | B. Coli communis, 
medium— 7 
1 tabe 20 c.c. of | 1 2 me —|—|-—|- II | Do. 
water taken. | 
2 TObes TOG: OF 2 3 |\-\+|/- -|-|- II Do. 
water taken. hee | 
4 tubes 5c.c.of |4]- 4 )}—+)|/-|-—|-!-| II Do. 
water taken. 
§ EHDES Gc. OL 15 5 |—|4+)-|-|-|- II Do. 
water taken. | 
5 tubes 1'¢.6.0f 15 6}—-|+)/-|-t-)-| IL) Do. ' 
water taken. | 
§ tubes “O1e.c, Gf | 5 7 |—|-—|-|-|-|- I | B. Grunthal. 
water taken. 
8 }—|-—|-}- | - | - I | Do. 
(c) Fecal bacilli in ‘ot c.c. and 
upwards. 9 /+/+|-|-j/—|-—| III | B. Neapolitanus. 
(d)Sporogenes milk test— | 10 |—|/+/—/—|—|- Il | B. Coli communis, 
In...20 €:C. | ete; 
(16) SamMpLE [.—WaTER FROM | | aa 
ABOVE THE INFILTRATION 1 ee a a ag, 
GALLERY—UNFILTERED es ER Ba ieee Ore: 
WATER— Life Saad — 
| | 
(a) Bile salt lactose, oe se ee) I | B. Grunthal. 
medium— 
Etube Of 20 cc. en) (S42 | SS 2S| aay |B. Coscoroba, 
water taken .. I | hie, 
2 tubes of 10 c.c. of 3 (+/+/+)/—/-—|-| III | B. Pneumoniz or 
water taken .. 2 | oe | Rhinoscleromatis. 
4 tubes of 5 c.c. of 4 = — + -| IV |B. Lactis erogenes 
water taken .. | 4) | | __or capsulatus. — 
5 tubes of I c.c. of 5 jm ]ti—-j|-}|-| — II | B. Coli communis. 
water taken ; Be ae 0 
5 tubes of ‘1 c.c. of “SE aa Veg os Poe et ee i Do. 
water taken I} 4 | 
5 tubes of or c.c. of | 7 |-|-|-|-|-|- I | B. Grunthal. 
water taken 15 | 
| 8 |-|+)/-|-|-|- II | B. Coli communis. 
(6) Fecal‘ bacilli in tc.c. and | 9g |+}/—/— —|-|- IV B. Coscoroba. 
upwards. | | | 
(c) Sporogenes milk test— [| 10 ;+/+/+/-—/-—|-| III | No. 73. 
in -20:C.c. 







(15) and (16) Typical bad mixtures in river waters ; note 
I and mixtures of organisms. 

prevalence of class 
