The weight of the new silver coinage au thorized by the recent act of Congress, which goes into operation in June next, as compared with that coinage since the passage of the act upon the same subject in 1837, is as follows: Silver. Act of Jan., 1837. Act ot Feb., 'S3. Dollar 4124 grains. No change. Half Dollar, 206* " 192 grains. Quarter do. 103J " 95 " Dime, 41? " 38-40 " Half Dime, 20 " 19-20 "