262 THER AMERICAN MONTHLY [Sep 
Springfield, pp. 219, one map, 1901.) Dr. Zeit and Dr. 
Futterer conclude from the results of their bacteriologi- 
cal studies, that the number of bacteria increase with 
high water and decrease with low water. Seriously pol- 
luted water becomes pure again after flowing for some 
distance. Pathogenic as well as sewage bacteria de- 
crease as the organic matter decreases, but water bacte- 
ria increase. The presence of saprophytic bacteria will 
~ hasten the removal of organic matter and the death of 
pathogenic bacteria. The authors did not succeed in find- 
ing any typhoid fever bacilli. Experiments indicate that 
they die in a few days in Lake Michigan tap water. The 
addition of boullion keeps them alive a somewhat longer 
time, but when saprophytes are added at the same time, 
exhaustion of food supply again causes early death, The 
Bacillus coli-communis may be found in water without 
sewage pollution and if found may not be virulent. Bucte- 
rial purification begins at Joliet. Sewage bacteria de- 
crease markedly at Morris and still more at Ottawa where 
the bacteriological flora of Illinois river and Fox river 
do not reveal great differences. Among the pathogenic 
bacteria found were Anthrax and Tetanus. The Coli- 
communis was found 55 times; B. lactis wrogones, 16 
times; B. enteritidis, 10 times ; Proteus vulgaris, 40 times; 
P. mirabilis, 3 times; B. pyocaneus, 2 times; B. tetani.3 
times; Staphylococcus pyogenes aureus, 3 times; B. an- 
thracis, 2 times. L. H. PAMMELL. | 
Outfit for Sale.—Objectives: 1-5” R. & J, Beck, adjust- 
- able, 3’’ and 14 Elliot Bros. adjustable; One bull’s-eye 
condenser, large, never used; One silver side reflector ; 
One stage forceps; 2 life boxes, one large and one small ; 
20 slides of arranged diatoms, test plates, costing me 
some $30 alone. My eyesight having suffered, (else [ 
should not sell), I will take $50.00 for the whole. 
W.C. Polluer, Cleveland, Ohio. 
