History of Air-Analysis 



47 



number of alleys and narrow streets in this city are also given here (see 

 table 29). 



Table 29. Determinations made by Smith of oxygen in air from the worst places in Perth. 1 



Place. 



Close, 70 South street 



Close, 44 Pomarium 



Do 



Do 



Weaver's Close, Pomarium . . 



Do 



St. Paul's Close 



Do 



Long Close, off George street 



Oxygen. 



p. ct. 



20.87 

 20.92 

 20.94 

 20.93 

 20.96 

 20.94 

 20.96 

 20.99 

 20.94 



Place. 



Long Close, off George street 



Close, 28 Watergate 



Close, 82 South street 



Hewat's Close, 148 South st. 



Do 



Close, 44 Meal Vennel 



Average 



Oxygen. 



p. ct. 

 20.90 

 21.02 

 21.01 

 20.97 

 21.00 

 20.90 



20.95 



1 Results of determinations made on air which was obviously indoor have been omitted. 



The results found by Smith in Scotland in 1863-5 are summarized by 

 him as follows: 



Av. p. ct. 

 of oxygen. 



Sea-shore and heath 20.999 



Summit of hills 20.98 



Base of hills 20.94 



Places not mountainous > 20.978 



Inferior parts of town (favorable, i.e., windy weather) 20.95 



Lower places, marshy, etc 20.922 



Forests 20.97 



Total average 20.96 



During a visit to Switzerland in August 1864, Smith collected a num- 

 ber of samples of air and determined the oxygen. In giving the results, 

 he includes for comparison a series of four analyses of air taken in the 

 following month among some brushwood at Reddish, near Manchester. 

 (See table 30.) 



Table 30. Determinations made by Smith of oxygen in air from marshy or confined 



places, Switzerland. 



Place. 



Sion, upper valley of 

 the Rhone, Switzer- 

 land, over water and 

 marshy grass (morn- 

 ing) 



Sion, over water and 

 brushwood (morning) 



Oxygen. 



p. ct. 



20.86 



f21.0n 

 20.94 

 21.05 

 21.02 

 20.96 

 20.94 

 20.95 

 20.83 

 21.00 

 20.90J 



Average. 



p. ct. 



20.95 



Place. 



Lauterbrunnen . 



Chamounix, Montanvert 

 Verdin, in the Sologne . . 

 Vouzerou 



Oxygen. (Average. 



Reddish, near Manches- 

 ter, England, among 

 brushwood 



p. ct. 



( 20.94 ) 

 ] 20.97 [ 

 ( 20.95 ) 

 j 21.03 

 ? 20.99 $ 

 \ 20.97 

 } 20.90 S 

 i 21.01 

 ( 20.90 

 20.92 

 20.98 

 20.95 

 20.90 



p. ct. 



20.953 



21.01 

 20.95 



20.937 



