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Engineer of 27 Trafford Street, Manchester.
1841 Pigot & Slater's Directory of Manchester & Salford, 1841 lists: John Glasgow, Screw bolt &c manufacturer. House: 53 Great Jackson Street, Hulme; John Glasgow, Screw bolt maker. House: 29 Fernley Street, Hulme (presumably a different John Glasgow); John & David Glasgow, screw bolt and lathe and tool manufacturers, Trafford Street, Deansgate; Smith & Glasgow, millwrights and engineers, Union Foundry, Trafford Street
1850 Slater's Directory of Manchester & Salford, 1850 includes John Glasgow, screw bolt, lathe, tool and patent rivet manfr, Union Foundry, Trafford Street
Adshead's 1851 map shows the 'Union Foundry - Glasgow & Co' with its entrance on Trafford Street, and the back wall facing Trumpet Street. The buildings occupied a ground area of about 70 ft by 130 ft. Note: The site was subsequently covered by the railway viaduct serving Manchester Central Station.
1863 Listed in Slater's Directory of Manchester and Salford as suppliers of railway carriage and wagon ironwork, rivet making machines, tools, chains, rivets, screw bolts, crabs, pulley blocks, and lifting jacks.
1865 Announcement of sale of contents of John Glasgow's works, to take place on 13th December. Some examples of equipment: 10cwt Condie’s Patent steam hammer by John Musgrave and Sons, Bolton; 5 cwt Naylor’s Patent steam hammer with 'sliding piston'; 26" turning lathe, will take 4 ft diameter; planing machine with capacity 21 ft by 5 ft by 4 ft; 10 ton travelling crane with double and single purchase crabs; castings for shearing, punching, and screwing machines; patterns for lathes, planing, shearing and punching and screwing machines 
1802 Born in Scotland
1827 Married Ann Woodcock-Blaze(?) in Manchester.
1841 Census: Screwbolt manufacturer, living at 53 Great Jackson Street, Hulme, Manchester, with wife Ann.
1851 Census: Screwbolt manufacturer and machinist employing 96 hands, living at Old Trafford Hall, Chester Road, Stretford. with wife Ann (b. S. America), daughter Caroline, a servant and a cook.
1861 Census: Engineer master, living at 1 Ash House, Stretford, with wife Ann (b. W. Indies (Guinea)(?)), daughter Caroline, and two servants.