Milk futures on the Chicago Mercantile Exchange fell Thursday, extending the week’s gloomy trend, while cash markets were mainly down. Class III milk for August is down 40 cents to $17.09. September is down 34 cents to $17.19. The October contract is down 30 cents to $17.67. November is 22 cents cheaper at $18.00. Contracts from December to February are five to fifteen cents lower. At $0.2650, dry whey is up $0.0025. Two transactions were made at prices ranging from $0.2625 to $0.2650. Blocks are constant at $1.96. Barrels have fallen $0.0450 to $1.8250. At $2.6150, butter is down $0.0150. At $1.12, nonfat dried milk is down $0.0025. At $1.12, two deals were completed.