Problem: James Watt (30 January 1736 (19 January 1736 OS) - 25 August 1819) was a Scottish inventor, mechanical engineer, and chemist who improved on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1781, which was fundamental to the changes brought by the Industrial Revolution in both his native Great Britain and the rest of the world. While working as an instrument maker at the University of Glasgow, Watt became interested in the technology of steam engines. He realised that contemporary engine designs wasted a great deal of energy by repeatedly cooling and reheating the cylinder. Watt introduced a design enhancement, the separate condenser, which avoided this waste of energy and radically improved the power, efficiency, and cost-effectiveness of steam engines.

From an early age Watt was very interested in chemistry. In late 1786, while in Paris, he witnessed an experiment by Berthollet in which he reacted hydrochloric acid with manganese dioxide to produce chlorine. He had already found that an aqueous solution of chlorine could bleach textiles, and had published his findings, which aroused great interest among many potential rivals. When Watt returned to Britain, he began experiments along these lines with hopes of finding a commercially viable process. He discovered that a mixture of salt, manganese dioxide and sulphuric acid could produce chlorine, which Watt believed might be a cheaper method. He passed the chlorine into a weak solution of alkali, and obtained a turbid solution that appeared to have good bleaching properties. He soon communicated these results to James McGrigor, his father-in-law, who was a bleacher in Glasgow. Otherwise he tried to keep his method a secret. With McGrigor and his wife Annie, he started to scale up the process, and in March 1788, McGrigor was able to bleach 1500 yards of cloth to his satisfaction. About this time Berthollet discovered the salt and sulphuric acid process, and published it so it became public knowledge. Many others began to experiment with improving the process, which still had many shortcomings, not the least of which was the problem of transporting the liquid product. Watt's rivals soon overtook him in developing the process, and he dropped out of the race. It was not until 1799, when Charles Tennant patented a process for producing solid bleaching powder (calcium hypochlorite) that it became a commercial success. By 1794 Watt had been chosen by Thomas Beddoes to manufacture apparatus to produce, clean and store gases for use in the new Pneumatic Institution at Hotwells in Bristol. Watt continued to experiment with various gases for several years, but by 1797 the medical uses for the "factitious airs" had come to a dead end.

When did he start doing chemical experiments?

Answer with quotes: in March 1788, McGrigor was able to bleach 1500 yards of cloth to his satisfaction.

Problem: Rowan & Martin's Laugh-In (often simply referred to as Laugh-In) is an American sketch comedy television program that ran for 140 episodes from January 22, 1968, to March 12, 1973, on the NBC television network. It was hosted by comedians Dan Rowan and Dick Martin. Laugh-In originally aired as a one-time special on September 9, 1967, and was such a success that it was brought back as a series, replacing The Man from U.N.C.L.E. on Mondays at 8 pm (ET). The title of the show was a play on the "love-ins" or "be-ins" of the 1960s hippie culture, terms that were, in turn, derived from "sit-ins", common in protests associated with civil rights and antiwar demonstrations of the time.

The first season featured some of the first music videos seen on network TV, with cast members appearing in films set to the music of the Nitty Gritty Dirt Band, the Bee Gees, the Temptations, the Strawberry Alarm Clock, and the First Edition. During the September 16, 1968, episode, Richard Nixon, running for president, appeared for a few seconds with a disbelieving vocal inflection, asking "Sock it to me?" Nixon was not doused or assaulted. An invitation was extended to Nixon's opponent, Vice President Hubert Humphrey, but he declined. According to George Schlatter, the show's creator, "Humphrey later said that not doing it may have cost him the election", and "[Nixon] said the rest of his life that appearing on Laugh-In is what got him elected. And I believe that. And I've had to live with that." In an episode of the ill-fated 1977 revival, a Nixon impersonator says "I invited the American people to sock-it-to-me.... you can stop now". On multiple occasions, producer George Schlatter attempted to get William F. Buckley Jr. to appear on the show, only to be refused each time until he suddenly agreed to an appearance. In the episode that aired December 28, 1970, Buckley appeared in an unusual sit-down segment (portions of which were scattered throughout the episode) flanked by Rowan and Martin and fielding questions from the cast (which included Lily Tomlin doing her Fast Talker shtick) and giving humorous answers to each. Near the end, when Rowan asked Buckley why he finally agreed to appear on the show, Buckley explained that Schlatter had written him "an irresistable letter" in which he promised to fly Buckley out to California "in an airplane with two right wings". At the end, Rowan thanked him for appearing, noting that "you can't be that smart without having a sense of humor, and you have a delightful one".

what happened after that?

Answer with quotes:
for a few seconds with a disbelieving vocal inflection, asking "Sock it to me?"