Angus Smith determined London air to vary in oxygen content from 20.857 to 20.95, the air in parks and open spaces showing the higher percentage; Glasgow air showed similar results, varying from 20.887 in the streets to 20 92 9 in open spaces.
Lake Cliff, Cycle and Oak Lawn parks are amusement grounds.
The administration and acreage of parks and open spaces, and their provisions for the public recreation, fall for consideration later, but some of them are notable features in the topography of London.
The city park system includes Ottawa Park (280 acres), Bay View Park (202 acres), Riverside Park (118 acres), Central Grove Park (loo acres), Collins Park (90 acres), Walbridge Park (67 acres), with a zoological collection, Navarre Park (53 acres), several smaller parks and triangles, and a boulevard, 18 m.
Besides St James and City Hall parks in the city, San Jose has Alum Rock Canyon Park, a tract of woo acres, with sixteen mineral springs, in Penitencia Canyon, 7 m.
Avignon, which lies on the left bank of the Rhone, a few miles above its confluence with the Durance, occupies a large oval-shaped area not fully populated, and covered in great part by parks and gardens.
The city has a public library (housed in the city hall) and eight parks (including Riverside on the Big Sioux), with a total area of more than 500 acres.
The London County Council's parks and open spaces increased in number from 40 in 1890 to 114 in 1907, and in acreage from 2656 to 5006 in the same years.
Brisbane is well provided with parks and open spaces; the Victoria Park and Bowen Park are the largest; the high-lying Mount Coot-tha commands fine views, and there are other parks and numerous recreation grounds in various parts of the city, besides the admirable botanical gardens and the gardens of the Acclimatization Society.
Other parks are Lake Park, also on the lake shore, at North Point, where stands the waterworks pumping station with its tall tower; Riverside and Kilbourn Parks, east and west respectively of the upper Milwaukee river, in the northern part of the city, Washington Park on the west side, containing a menagerie and a herd of deer; Sherman Park on the west side, and Kosciusko, Humboldt and Mitchell Parks on the south side.