richard Arkwright invented the water frame. James Hargreaves invented the spinning jenny. Both inventions were used in the textile industry during the industrial revolution in England.
Infinitely many.
<span>45 + 45, 46 + 44, 47 + 43, ... , 98 + 1, 99 + 0, 100 + (-1), 101 + (-2) and so on and on and on. Without an end in sight.</span>
D, communists hope this helps :)