larly adapted for with them during their aerial flights for some use in controlling the motive agent for hydraulic time after birth. With the exception of one or similar elevators. The valve is very simply con- peculiar species, the young bat always clings structed and may be readily and quickly… … might render flight difficult or impossible), and at the same time performs the office of a nurse. VALVE FOR HYDRAULIC ELEVATORS. It is well known that many species of bats have occasionally two young at a birth, but I have ing by which it is operated is shown herewith, also a never found a mother…
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