Finally, a second chemical is added to the mixture. When enough of this second chemical has been added, the mixture will change color. The amount of that second chemical that was added reveals the concentration of the parameter of interest (which otherwise could not be inexpensively measured in the field).
The
Alewife Reservation
is a unique natural resource for the communities of Belmont, Arlington and Cambridge
and home to hundreds of species, including hawks, coyotes beavers, snapping turtles, wild turkeys and muskrats,
the reservation is a unique natural resource for the community.
Historical information (Powerpoint)
Friends of Alewife Reservation works to protect and restore this wild area and the surrounding area for the water quality, native plants, animals and over 90 bird species with paths for walking, running and biking, recreation, and for classroom education and research. We regularly steward and preserve the Reservation area for wildlife and for the enjoyment of present and future generations.