1914] 
NOLTE—SALIVARY ORGANISMS AND AIR POLLUTION 53 
TABLE I 
DATA ON THE COLLECTION OF AIR COCCI 
_ [388 [ази 
Time |95д |954 8 |Number 
of Puri © ons! given 
Place of exposure. сао арар! 6 Remarks 
expo- |-30,%./89,4. to 
sure | 32 920 оо 969| stock 
ECHO dx culture 
Window sill outside of lab-| 15 min- 21 to 27 
oratory, 2nd floor. utes. 14 7 incl. 
On shelf, center of labora- One person in 
tory room. do. 2 0 room. Abun- 
dance of Mo- 
nilia present. 
On table, in reading room. do. 2 0 do. 
On table, in plating room of Monilia sup- 
laboratory. do. 0 0 pressed growth. 
On table, in basement do. 3 0 
On lawn, in garden do. 9 1 28 to 31 
incl. 
In living room. do. 7 6 32 to 37 
incl. 
Window sill, 4th floor, Much soot оп 
downtown section do. 18 0 plate. 
On table, іп draughting One person 
room. do. 1 1 38 in room. 
After exposure the plates were covered and incubated aérobically 
for 24 hours at 37?C. Stained preparations of all colonies de- 
veloping were made and examined under the microscope. The 
coccus forms were transferred to agar slopes, and after incuba- 
tion for 24 hours at 37?C., were kept in stock at 20°C. Sev- 
eral of the plates exposed in various parts of the laboratory 
building were rendered worthless by an abundant growth of 
Monilia sitophila. 
The method of examining the skin for organisms closely 
allied to those characteristic of saliva, was as follows:  Test- 
