No Copyright - United States
No known copyright restrictions.
No known restrictions on use.
Notes (acquisition):
Massachusetts Metropolitan District Commission; Massachusetts Department of Conservation and Recreation; Massachusetts Water Resources Authority
Notes (publications):
Copy made March 4, 1918 from Transactions of the American Society of Civil Engineers, Vol. 83 (1919-1920), 105-199, Nagler article, in Discussion by Stearns (p. 175)