There are times, of course, when very different conditions prevail. An unexpected rise in the bank rate in London, the announcement of a big loan or any one of many different happenings, are apt to cause a reduction in the exchange market and a bewildering movement of rates up and down. At such times a rise or fall of fifty points in sterling within half an hour is not at all out of the ordinary, while in times of panic, or when great crises impend, the fluctuations will be three or four times as great. During the latter part of October, 1907, and in November, the exchange market fluctuated with greater violence than, perhaps, at any other time since the gold standard was firmly established. Thrown completely out of gear by the premium of 3-1/2 per cent. a day for currency during the panic time, the exchange markets for some time would rise and fall several cents in the pound on the same day. Completely baffled by this erratic movement, many bankers temporarily withdrew entirely from the market. As to the relative importance of the different kinds of exchange, sterling, of course, occupies the most prominent position. What proportion of the total of exchange dealt in in the New York market consists of sterling it is impossible to determine, but that it is as great as the volume of all the other kinds of exchange put together can safely be said. Many big dealers, indeed, make a specialty of sterling, and if they handle any other bills at all, do so only on a very small scale. As to whether francs or marks come next in volume, there is a difference of opinion. With Germany our direct financial transactions are probably considerably larger than with France, but the position of Paris as a banking centre makes the French capital figure prominently in many operations where the French market is not directly concerned. Despite the fact that sterling easily predominates, the volume of franc and mark bills, too, is enormous. Drafts on Paris for from three to five million francs and on Berlin for as many marks are not at all infrequently traded in in the exchange market, and at times bills for very much larger amounts have been drawn and offered for sale. Bills drawn in other kinds of currency--guilders on Holland, for instance, form an important part of the foreign exchange dealt in in a market like New York, but are subservient in their rate fluctuations to the movement of sterling, marks, and francs. The latter are, indeed, the three great classes of exchange, and are the basis of at least nine-tenths of all foreign exchange operations.