. The microscope and its revelations. o im-part a finer movement to the screw. The relation between the pitchof the screw and the circumference of its head is such that if theedge be moved forward a quarter of an inch, an object will be raisedone-thousandth of an inch ; and if it be moved an eighth of an inch,the object will be raised a two-thousandth of an inch. In the original instrument the plate was supported on twopillars, in order that as little heat as possible might be conveyed tothe freezing-plate from the body of the instrument. In the newinstrument the size of the three supporting p
. The microscope and its revelations. o im-part a finer movement to the screw. The relation between the pitchof the screw and the circumference of its head is such that if theedge be moved forward a quarter of an inch, an object will be raisedone-thousandth of an inch ; and if it be moved an eighth of an inch,the object will be raised a two-thousandth of an inch. In the original instrument the plate was supported on twopillars, in order that as little heat as possible might be conveyed tothe freezing-plate from the body of the instrument. In the newinstrument the size of the three supporting pillars and screws i> NOmuch reduced that the conducting surface is not greater than in theold microtome. The arrangement for cutting imbedded sectionsconsists of a tube which fits the principal well of the microtome, andwithin which fits a hinged part similar to an ordinary vice, ^iththe instrument are provided the means of preparing paraffin blocksfor imbedding sections. When it is intended to u*e the microtome for imbedding, the.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
