io8 The Ohio Naturalist. [Vol. VII, No. 5, 



Ex. No. 5. Swab was taken from a cup at a pump at a well 

 on a country road along which there was a great amount of 

 travel. The well was about 30 feet deep and covered with a 

 board platform. The following bacteria were shown to be present: 



1. Sarcina lutea (Fliigge). (See above). 



2. Sarcina aurantica (Fliigge). (See above). 



3. Sarcina tetragena (Koch). Slighty pathogenic and fre- 

 quently associated with tubercular processes in the body. 



4. Bacillus coli (Escherlch). The normal habitat is the 

 intestinal tract of man and animals. It has been isolated from 

 the mouths of healthy persons. 



5. Bacillus sub tilus (Ehrenberg). Widely distributed. Common 

 "hay bacillus." 



It was extremely dusty in the A^icinity of this well. There 

 was an outhouse about 30 feet from the well but on the side of 

 the hill below. It does not seem probable that the well was 

 infected from this source. No cases of typhoid fever or other 

 disease were reported in the vicinity. 



Ex. No. 6. Swab was taken from a cup in Chicago. The 

 following bacteria were shown to be present: 



1. Micrococcus aureus (Fliigge). Distributed in air, etc. 



2. Micrococcus pyogenes aureus (Rosenbach). (See above.) 



3. Sarcina aurantica (Flugge). (See above.) 



4. Sarcina lutea (Flugge) . (See above). 



5. Bacillus amylobacter (v. Tieghem). Widely distributed. 



6. Bacillus coli (Escherich). (See above.) 



The water coming to the fountain where this cup was found 

 came from four miles out in Lake Michigan. 



Ex. No. 7. Swab was taken from a cup in connection with a 

 fountain in a city of 40,000 in Wisconsin. The following 

 bacteria were shown to be present: 



1. Spirillum rubrum (v. Esmarch). (See above.) 



2. Sarcina lutea (Flugge). (See above.) 



3. Micrococcus pyogenes aureus (Rosenbach). (See above). 



4. Micrococcus radiatus (Fliigge). Widely distributed. 



5. Bacterium pneumoniae (Zopf). (Penumococcus) . Found 

 frequently in normal mouths. 



6. Bacillus prodigiosus (Ehrenberg). Widely distributed. 

 (" Bloody bread bacillus.") 



Ex. No. 8. Swab was taken from cup in a railway station in 

 Chicago at six o'clock in the evening when the station was 

 crowded with people returning from the city. The following 

 bacteria were shown to be present: 



1. Sarcina tetragena (Koch). (See above). 



2. Sarcina aurantica (Fliigge). (See above.) 



3. Sarcina lutea (Fliigge). (See above.) 



4. Micrococcus roseus (Bumm). (See above.) 



