Bacterial Flora of the Semi -Desert Region of New Mexico. 221 



November 29: 



PI. 20 min. — 126 bacteria and 6 molds. 

 Pi. 40 min. — 143 bacteria and 5 molds. 

 PI. 60 min. — 133 bacteria and 6 molds. 

 Average per 10 min., 40.3 bacteria. 

 Note. — Large molds on second and third plates undoubt- 

 edly prevented the growth of some bacteria. 



Since the details of the above experiments are rather 

 numerous to carry in mind, it may be advantageous to cast 

 them into table form. For such a summary the figures have 

 already been reduced to a common basis, that is to a basis of 

 ten minute exposures. 



The figures thus obtained for the several plates in a given 

 experiment are averaged for the final figure of the table. 

 The experiment number, date, and number of plates averaged 

 are given, as well as the weather conditions which neces- 

 sarily are made very brief. The table is as follows: 



Table I. — Summary of Plate Exposures. 



ment. 





Cl v 

 £ bC 



age 

 aeteria 

 ing 

 Min. 







Date. 



co 



O u 



2 



Atmospheric Conditions, Etc. 



QJ 



Cu 

 X 



W 





S3 



b. W- CO , 



3 Oft S3 



6 Oh 

 % 





I 



Sept. 28,1898 



3 



71. 



Stiff breeze from S. W., no rain for weeks. 



2 



Oct. 7, '98 



3 



I02.7 



Gentle breeze — flies interfered. 



3 



Oct. 13 



1 



32. 



Stiff breeze from E. 



4 



Oct. 17 



3 



36.1 



Slight breeze. 



5 



Oct. 20 



2 



50. 



Moderate breeze from W. 



6 



Nov. 17 



3 



5-8 



Calm. 



7 



Nov. 28 



3 



11. 6 



{Moderate breeze from S. ; also 5 in. of 

 \ snow two days previous. 



8 



Dec. 7 



3 



49.8 



Slight breeze from S. 



9 



Dec. 20 



1 



61.3 

 21.6 





10 



Dec. 31 



3 



Stiff breeze from N. W. 



1 1 



Feb. 13, 1899 



4 



3-8 



Slight breeze from S. 



12 



March 28 



4 



4-75 



Slight breeze from S. W. 



13 



Oct. 5 



2 



49- 



Calm. 



14 



Oct. 19 



3 



52.8 



Calm. 



15 



Nov. 15 



3 



2-5 



After heavy rain. Slight breeze from S.W. 



16 



Nov. 16 



2 



14.65 



Next day after rain. Strong wind from S.W. 



17 



Nov. 17 



3 



4o-3 



One day later. Practically no wind. 



I I 



