24 



DR. R. ANGUS SMITH ON THE 



Air from worst places in the City of Perth. 



Oxygen. 



Mean. 



Close, 70 South Street 

 „ 44 Pomarium 



Weaver's Close, Pomariiun.... 

 St. Paul's Close '.'. 



Long Close, off George Street . 

 Weaver's shop, 44 Pomarium . 



Close, 28 Watergate 



From a conduit, Athole Crescent 



Close, 82 South Street 



From a conduit, Athole Crescent 



Hewit's Close, 148 South Street . . 



From conduit, Stormont Street 



Cloee, 44 Meal Vennel 



Mean 



20-87 

 20-92 

 2o'94 

 2o'93 

 20*96 

 20'94 

 20-96 

 20-99 

 20-94 

 20-90 

 20-88 

 20-93 

 2 1 -02 

 20-93 

 20-95 



21-01 

 20-84 

 20-89 

 20-97 

 2I"00 

 20-90 

 20-90 



20-935 



Scotch Analyses classified. 



Oxygen. ^ 



Mean of the sea-shore and the heath 20-999 



Mean of the tops of hills 20*98 



Mean of the bottoms of hills 20-94 



Mean of all places not mountainous 20*978 



Mean of inferior parts of a town (favourable, i. e. 



windy weather) *o"935 



Mean of lower marshy, Ac, places 20*922 



Mean of the forests 2097 



Mean of all 20'9S9 



or 20*96 



I conclude, therefore, that in order to obtain the mean, 

 20'96, it is needfiil to include very inferior air. It is, there- 

 fore, the mean composition of air as it is found in whole- 

 some and less wholesome places, not the mean of the finest 

 atmospheres. 



It will be seen that here the sea-shore and open places 

 still command the highest amount of oxygen, although the 



