Engineering reminiscences contributed to "Power" and "American machinist" (1908)
Porter, Charles T. (Charles Talbot), 1826-1910 · New York, J. Wiley · leaf 315
trations show this regulating valve which Idesigned and made in two sizes. The brass liner for the lower seat was passed through the upperseat by being made thinner than the upper liner. Those for thevalve were made $ inch too long, and guttered in the lower edge.They were then driven down by a set… … Mr. Porters Regulating Valve.
