If you are asking âI have a Canadian $2.00 bank note, 1986 serial number ABC########## signatures blahblah how much is this worthââ¦.. If the Serial number does not start in AUH, then itâs worth $2.00.
Evidence of ancient washing soap was found at Sapo Hill in Rome, where the ashes containing the fat of sacrificial animals was used as a soap. The earliest washing machine was the scrub board invented in 1797. American, James King patented the first washing machine to use a drum in 1851, the drum made King's machine resemble a modern machine, however it was still hand powered. In 1858, Hamilton Smith patented the rotary washing machine.
PCB â Used in the 1920's. The earliest PCB's (printed circuit boards) were made from materials like Bakelite, Masonite, layered cardboard and even thin wooden planks. Holes were drilled into the material and then flat brass wires were riveted or bolted onto the board.