"The Thames pH book is a litmus paper book of 20 plates. 18 pages are dipped in Thames water from the Environment Agency's 18 testing sites on the weekly 'River Run' [from Purfleet to Kew]. The test results are from the 30th of August, 2001."--Graph paper insert.
Subject Terms:
Artists' books -- Great Britain. | Acid pollution of rivers, lakes, etc. -- Great Britain. | Water -- Pollution -- England -- Thames River. | Thames River (England) -- Environmental conditions. | Bush, Tracey -- Publisher