Scooter,
I'm not sure where you are reading your history. And I don't mean that facetiously. I would be very interested to see a reference to gold or silver CAUSING deflation. I'm not even sure how that could happen unless you had economic growth - and hence demand for money - shooting theough the roof. Or perhaps in the case of silver, some huge new industrial demand that outstripped new supplies by some significant margin. Other than that, how could you have the quantity of gold or silver decline faster than its new production? Deflating a paper currency to match gold (assuming that ever happened) isn't caused by gold, it is caused by the inflated paper currency.
I would also like to see a reference for bimetallism as a stabilizing influence.
One thing to note in these threads is that I'm taking a contrarian position to give a little bit of the other side of the story.
As for my history. Go read anything political from the 1890s. Anyone with the slightest bit of debt were getting hurt badly because the money was deflating significantly causing wages to go down while they owed debts from the previous nominal values. Luckily for Republicans, the cyanide process for extracting gold was discovered and a massive ore deposit was located in South Africa which added a significant sum to worldwide reserves and finally allowed for some currency growth. This achieved William Jennings Bryan's inflation without having to go to silver and crushed his political movement.
If you have not read William Jennings Bryan's "Cross of Gold" speech as I mentioned, I suggest you do so. That will give you an idea of the emotional outbursts that were going on from the farming community specifically because they were getting strangled by debts that were increasing in value.
It is important to realize that both inflation and deflation are terrible for the economy if they are not expected. A little bit of expected deflation can be worked out, and a little bit of expected inflation can be worked out. The problem is when you go in either direction in high values that are not expected.
The metal standards proved to be pretty good at giving expected low rates of deflation for a long time. However, do you believe that the natural conditions of the markets will always work out in that favorable way? The way I see it, we were lucky with metals a few times. As the new discoveries in California and the Yukon came into the market, the United States was on a bimetallic standard fixed at 16 to 1. This, as has been mentioned, is a price-fixing mechanism, but it did work to keep the appreciation of one of the metals from significantly increasing inflation, because as the ratio went slightly higher than 16 to 1, the country was effectively on a silver standard. If the ratio dipped slightly below, the country was effectively on a gold standard. This balancing act seemed to keep the metals pretty close to the desired ratio, although it did have to be adjusted a couple of times in various countries.
In the 1870s, the US government started to deflate the currency in preparation for a return to a metal standard, but the bankers (yes they were the ones behind it) wanted to return only to gold because they enjoyed its deflationary aspects. Currency deflation is good for creditors, bad for debtors. When the country went only to gold, it did create bad deflationary problems. You can get any evidence you want from the political achievments of guys like Bryan and the free-silver movement.
I'm not here to defend fiat money in any way. I just try to have some good discussions on both sides of the aisle because it is irresponsible for some to believe that there is a perfect system out there that is flawless. The negatives in my mind to a gold standard are that you are tying your currency to a commodity with no physical use, when every other country in the world does not back its currency with the metal and it trades with the jewelry market. This time period is nothing like the previous gold standards, where the other countries were onboard and allowed for gold to trade as a currency rather than as a pretty yellow metal.
The negatives to fiat currency are not that they are "printed out of air" or "based on nothing." In fact, they are designed to be based on all commodities in the economy, rather than just one. They are designed to be a reflection of the output of a specific country, with their worldwide acceptance as their backing. The real negative is that they are managed very poorly, at least in this country. Our central bank should just have a mandate to maintain purchasing power of the currency, but instead they have separate mandates to prop up the banking industry and maintain economic growth. These are things that are impossible from a currency perspective.
As I see it, fiat currency can work well if handled right. It works fine in Switzerland and it is starting to work fine with the euro. Those currencies are only getting underminded by the fact that they are starting to deflate against the dollar because they are managed so well and it is managed so poorly. If the central bank utilized inflation targeting rather than all of this banking BS, it could mimic the gold standard with fiat currency and be able to eliminate all of the potential negative effects of a monometallic system.