thinned away, un- the motion of the slides. The advantages of this form til, at the end of twenty minutes, the last had emerged. of the apparatus are that the usual glass slides as used The stream of bats when at its maximum was ten feet by microscopists, which are three inches long by one square,… … classified scale of 14 or } inch might be used without CLASS MICROSCOPE ARRANGED FOR EXAMINING difficulty by those accustomed to the manipulation of FORAMINIFERA. a microscope. The only disadvantage which the instrument labors blance was increased by the slightly sinuous course pur- under is that…
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![An illustration from Telephones and telegraphs: 1902 : [and Municipal electric fire alarm and police patrol systems] (1906)](https://img.insideoutlibrary.com/img/200/ia-cu31924022817674-156-44.webp)
