Water Ballast Motor Roller 
87 
wheel in front, which pressed down the larger clods of earth 
to prevent the seed potatoes from rolling out of line. 
Fig. 4. — Water Ballast Motor Roller (Article 1718). 
Article 3070. — Messrs. Edward Spencer & Go ., Saracen’s 
Head Yard, 5 Aldgate, London, E. “ Egg Box to contain one 
dozen eggs. Maguire’s Patent, for parcel post, taking all sizes 
of eggs.” Price 8<7. — This was an ingenious plan for holding 
the eggs, which were slung in hammocks formed of a material 
like linen, strained from end to end inside the box and passed 
through partitions running across from side to side. The 
strain on the ends of the box necessitates a somewhat heavy 
construction. The weight of one box to carry a dozen eggs 
was 1 lb. 5 oz. empty, and putting the weight of twelve eggs 
at 1 lb. 8 oz., the total weight reaches 2 lb. 13 oz. The great 
weight of the box was its chief drawback. 
Article 3552 . — The Ivel Agricultural Motors , Ltd., 
45 Great Marlborough Street, London, W. — The novelty in 
this exhibit was the “ Ivel Patent Carburettor,” with which 
either ordinary paraffin or petrol could be used. This is of 
course an advantage both in cost of running and ease of 
procuring f uel. We saw the tractor at work using paraffin, and 
the result was good and economical. 
