638 Report on Cream-separators. and 
the weather. The cover is made of galvanised corrugated steel, 
and laid on lengthwise of the waggon, as shown in the 
accompanying drawing ; and, being arched across, it gives the 
Fig. 15. — Messrs. Thomas and Co.'s Corrugated Iron Cover for 
greatest possible strength, with a minimum of weight. The 
steel is fitted to a frame of angle- and tee-iron, resting on pivots 
(when the roof is closed), in the bottom of slots, of the arched 
brackets shown in drawing. The roof may be locked on both 
sides, and opened from either side without unlocking the other. 
The opening is effected by lifting the eaves to the centre, in 
the opening ; the roof revolves eccentrically carrying the front 
eaves a convenient distance above the centre of the waggon. 
The contrivance seems equally adapted for railway waggons. 
Messrs. Arnold and Son, West Smithfield, had a Portable 
Syringe specially adapted for washing hops. The tube or 
cylinder is fixed on a metal foot " which stands on the bottom of 
the water vessel," and is made of brass. The plunger is of solid 
metal, and requires no packing. To the plunger is attached a 
spiral spring, which raises it into position when forced down. 
There are two simple ball-valves, and an independent tube runs 
