than to rearrange the interior superb lens ordered some time previously, but the end to end and forms lines whieh run at right angles to of the vast nave of the Machinery Hall and to ‘‘em- shutter was not yet completed. The lens was used the main collecting drains. The space between these bellish”… … water is furnished for several hours, and the filtering position. He would thus furnish its visitors with elements of instruction such as have not as yet been sand is washed by the disturbance created by revers- ing the current until the water which comes from seen yvrouped in any exposition, and…
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