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John Mackay (c1798-1873)
1874 Obituary 
JOHN MACKAY was born at Glasgow, and in the year 1828 went to Drogheda in charge of a new steam dredger, which he steamed over from Glasgow.
After working the dredger for some time, he became connected with a small foundry in Drogheda, which under his superintendence grew into an establishment of some importance, known as the Drogheda Iron Works, where locomotive engines, and marine engines and boilers for the Channel steamers were manufactured in considerable numbers, and some of the best work in Ireland was produced.
About 1858 he retired from these works, and practised as a consulting engineer to the time of his death, which took place on 26th July 1873, at the age of about seventy-five.
He became a Member of the Institution in 1856.