I think 2 days is more than enough. If you have more time check out the ford rouge works tour also Henry fords home tour. Actually driving around Detroit is interesting in itself looking at the sparkles of magnificence in the ruins. There are whole areas that are depopulated and some magnificent buildings. The fox theater is amazing... Also get yourself a coney dog, no trip to Detroit is complete w/o one
-- Bill Taney Sent From My iPad On Jul 3, 2011, at 9:29 PM, Bill Burns <bi...@ftldesign.com> wrote: > On 7/3/2011 8:38 PM, Jim Nichol wrote: >> I strongly disagree. Yes, Google will tell you that many others worked on >> the light bulb. But those stories all conclude that none of them were >> practical. Edison's contribution was not only that he invented the power >> plant, but more importantly, he invented the first practical incandescent >> bulb. > > The British would disagree: > > "In 1850 Swan began working on a light bulb using carbonized paper filaments > in an evacuated glass bulb. By 1860 he was able to demonstrate a working > device, and obtained a British patent covering a partial vacuum, carbon > filament incandescent lamp. However, the lack of a good vacuum and an > adequate electric source resulted in an inefficient bulb with a short > lifetime. > > "Fifteen years later, in 1875, Swan returned to consider the problem of the > light bulb with the aid of a better vacuum and a carbonized thread as a > filament. The most significant feature of Swan's improved lamp was that there > was little residual oxygen in the vacuum tube to ignite the filament, thus > allowing the filament to glow almost white-hot without catching fire. > However, his filament had low resistance, thus needing heavy copper wires to > supply it.[7] > > "Swan received a British patent for his device in 1878, about a year before > Thomas Edison. > > "In America, Edison had been working on copies of the original light bulb > patented by Swan, trying to make them more efficient. Though Swan had beaten > him to this goal, Edison obtained patents in America for a fairly direct copy > of the Swan light, and started an advertising campaign which claimed that he > was the real inventor. Swan, who was less interested in making money from the > invention, agreed that Edison could sell the lights in America while he > retained the rights in Britain." > > http://en.wikipedia.org/wiki/Joseph_Swan > > -- > Bill Burns > Long Island NY USA > http://ftldesign.com > _______________________________________________ > Phono-L mailing list > http://phono-l.oldcrank.org _______________________________________________ Phono-L mailing list http://phono-l.oldcrank.org
