Small Pneumatic Grain Elevators, at Messrs Leetham & Son´ s Flour Mills, York— Installations of small capacities have recently been introduced, particularly for the use of millers, maltsters, oil-mills, and the like. The one here described is that at Messrs Leetham &: Sons' Flour Mills, York. The figure shows the whole installation in diagrammatic form. As these small plants are very similar to the large ones already fully described, it will suffice to mention that D is an existing elevator into which the pneumatic installation has to discharge its load, G is the receiver, F the filter, c the blower, B the air trap, and A the exit for the spent air ; E is another air trap through which the dust from the filter may be drawn off into sacks.