The Savannah Courier of the 27th inst., says:—" During the recent Agricultural Fair in Macon, we conversed with hundreds of planters in regard to the prospects and probable extent of the cotton crop. Their opinions varied according to locality, and jthe influence of seasons and storms. In sections the yield will unquestionably be short, while in others it will be nearly double U-ef last year. One planter from Putnam, for instance informed us that he last , year made 70 bales. This year he has already saved 120 bales, and has a prospect of 50 bales more. He stated however, that his was an extraordinary crop, and that his neighbors were not doing so well. Nearly every man we spoke with expected to do as well as last year, while three fourths said they were making more. From these conversations we have arrived at the conclusion that the cry of " short crop" in Georgia is likely to prove a delusion. If we are not greatly rristaken, the receipts at ports will show an increase ol 50,000 bales over those of last year. The Dry Dock at Chicago is finished. It is situated between Van Buren and Harrison streets,on the west side, near Scammon and Haven's oil mill. It is built at right angles to the river, a very substantial lock similar to a canal lock opening into it. Length 236 feet—width 56 feet at the top and 37 feet at the bottom—depth of water above the blocks 8 feet—and it has a capacity suffisient to admit and repair the largest sized sail vessels and propellers upon the lake. The dock is emptied by an engine of twenty horse-power, attached to a lifting water-wheel capable ot throwing out 850 cubic feet of water per minute. The whole of the machinery is exceedingly simple. The dock was emptied on Tuesday in 2 3-4 hours, and can be filled in 3-4 of an hour.