1914] 
NOLTE—SALIVARY ORGANISMS AND AIR POLLUTION 59 
TABLE II 
DATA ON THE VIGOR OF SURFACE GROWTH OF AIR, SALIVARY, AND DERMAL COCCI 
No. of Growth characteristics 
Source of | Temperature | cultures 
organism | of incubation used No | Very | Mea- | Good | Abun-| Very 
growth| faint | ger dant | heavy 
Saliva 20°C. 20 -- 3 7 10 — — 
Air 20?C. 18 1 — — 4 7 6 
Skin 20°C. 6 — 1 2 2 1 -- 
Saliva 37°C. 20 — — 7 13 — — 
Air 37?C. 18 2 1 9 6 — — 
Skin 37°C. 6 -- 1 — 4 1 — 
In the following enumeration are listed the colors of the 
various pigments produced by the air, skin, and salivary cocci, 
the figure on the left having reference to the number in Ridgway 
corresponding to the particular pigment produced: 
Salivary cocci 
15" d Light pinkish cinnamon 3 | 
15” с Intermediate between light pinkish and 
pinkish cinnamon 
15" b Pinkish cinnamon 
15" a Intermediate between pinkish cinnamon 
and cinnamon 3 
15" Cinnamon 1 
21’ e Intermediate between massicot and straw 
yellow 
23' f Naphthalene yellow 
19 f Maize yellow 
19’ b Mustard yellow 1 
One gave too little growth for determination of 
the color. 
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