﻿18 



METHODS FOR THE DETERMINATION OF 



This table shows analyses of the room-air and of the soil pipe, and 

 also of the external air, with the organic matter estimated as ammonia. 

 In this table the greater proportion of free ammonia as compared with 

 albuminoid ammonia in the air of the soil pipe is also shown, as in 

 Table I ; while in the majority of the analyses of room-air and of the 

 external air the proportion of albuminoid ammonia is again greater 

 than the free ammonia, as was shown by the results in Table I. 



TABLE V. 



No. 



Date, 



1895. 



Hour of day. 



Source of 

 the air. 



Atmospheric conditions. 



Mgs. of NH3 in 1 

 cbm. of air. 



of 

 exp. 



Clouds. 



Tempt. 



Bar. 



Wind. 



FreeNH, 



Alb.NH,. 



1 

 2 

 3 

 4 



6-III 

 7-III 

 7-III 

 8-III 



10.00 a.m. 

 9.50 " 

 2.00 p.m. 



10.00 a.m. 



External 



Part Cloudy 

 Cloudy 

 Raining 

 Cloudy 





5.5° C 



8.5 " 

 12.0 " 



7.5" 



mm. 



775.3 



768.0 

 764.2 

 757.1 



S. E. 



s.w. 



E. 



N. E. 



mgs. 

 2.336 

 7.743 

 1.470 

 1.457 



mgs. 



9.345 



1.295 



4.411 



2.915 



5 



8-III 



2.00 p.m. 



Room 



(( 



1 



8.5 " 

 19.5 " 





754.7 



W. 



23.8095 



29.761 



6 



7 



8 



9-III 

 ll-III 



12-111 



11.45 a.m. 

 12.10 p.m. 



10.00 a.m. 



External 

 Room 



Light Snow 



Snowing 

 j Cloudy ) 

 i Misty j 



-0.5 " 



0.0" 



2.0" 



19.8 " 



756.3 

 769.1 



767.6 



N. W. 



N.E. 



N. E. 



10.526 

 10.177 



19.230 



13.157 



12.722 



27.472 



9 



10 



11 



12-III 

 13-III 



13-III 



1.45 p.m. 

 11.00 a.m. 



2.00 p.m. 



External 

 Room 



Foggy 

 Cloudy 



3.0" 



8.0" 



8.5" 



20.5 " 



767.3 

 766.5 



764.1 



E. 



S. E. 



S. E. 



13.559 

 0.000 



0.000 



84.745 

 102.388 



32.258 



12 

 15 



14-III 

 15-III 



11.15 a.m. 

 11.15 " 



External 



Clear 

 Raining 



3.5" 

 -3.0 " 



764.8 

 766.0 



N. W. 

 N.E 



0.000 

 0.000 



10.810 

 3.333 



17 



16-III 



9.30 '' 



Room 



Clear 





0.0 " 

 18.0 " 



[ 



755.8 



N. W. 



12.121 



9.0909 



18 

 19 

 22 



16-111 

 18-III 

 19-III 



1.00 p.m. 

 11.45 a.m. 

 12.15 p.m. 



External 



Cloudy 





-0.8 " 



-f-5.5 " 



4.0" 



756.5 



759.8 

 763.2 



N. W. 

 N. W. 

 N.E. 



1.470 

 0.000 

 0.900 



1.4705 



5.128 



3.597 



This table, containing the determinations of organic matter in room- 

 air and in external air which form a part of Table TV, shows the 

 atmospheric conditions prevailing at the time the analyses were made. 

 The data as presented here show no marked variations in the quantity of 

 organic matter in external air as the result of the atmospheric condi- 

 tions. The most marked influence noticeable is the gradual decrease 

 in the quantity of ammonia during several days of rain, snow, and 

 fog ; and also but a slight increase during the clear days immediately 

 following that period. The season of the year at which these experi- 

 ments were made is also most probably that in which the atmospheric 

 influences on the quantity of organic matter in air are least effective. 

 The amount of moisture in the soil at this season is sufficient to prevent 

 the rise of large quantities of dust. The quantity of organic matter in 



