CHAPTER XX.

INDUSTRIAL MACHINES.

Inventions Engender Others.--Co-operative Growth.--Broom Making.--Crude Condition until the Modern Lathe, Mandrel, Shuttle and Sewing Machine.--Broom Sewing Machines.--Effect on Labour.--The Brush and Brush Machines.--A Hundred Species of Brushes, each Made by a Special Machine.--First Successful Brush Machine, Woodbury’s, 1870.--Wonderful Operations.-- Street-Sweeping Machines, 1831.--Most Effective Form.--Abrading Machines.--Application of Sand Blast.--Nature’s Machine Patented by Tilghman in 1870.--Things Done by the Sand Blast and How.--Emery and Corundum Machines.--Vast Application in Cutting, Grinding, Polishing.--Washing and Ironing Machines.-- Their Contribution to Cleanliness and Comfort.--Laundry Appliances.--Old and the New Mangle.--Starch Applying.--Steam Laundry Machinery.--Description of Work done in a Modern Laundry. 328