To facilitate installing, removing and servicing the engines of giant bombing planes, what probably is the largest hydraulic portable elevator, 26 feet high, has been built by Lyon-Raymond. Iron Works, Greene, N. Y. It is equipped with both an elevating boom and removable platform, so it may be used either with or without the platform. A hydraulic hoist powered by a three-horsepower motor elevates the platform and boom, which have a lifting capacity of 5,000 pounds and speed of about 12 feet a minute with maximum load.