The Journal of San Diego History
SAN DIEGO HISTORICAL SOCIETY QUARTERLY
Summer 1974, Volume 20, Number 3
Page 61.
Page 62.
Construction of original Sweetwater Dam showing use of granite riprap (1887)
Page 63.
Construction of El Capitan Dam showing use of granite (c 1935)
Page 63.
Old log cabin in Harmony Grove, Escondido, showing use of granite in chimney
Page 65.
Wire saw at Pyramid Granite Company, Escondido
Page 65.
Surface plate with delicate measuring device atached 33
