| 摘要 |
Successive sections are taken from animal or botanical material embedded in a supporting block. The block is then indexed rotatably step by step. In the several indexed positions of the block, the work surface from which the section has been removed is washed and stained and photographed and the block is advanced radially toward the knife for further sectioning and for staining and photographing each newly exposed surface. In each cycle the block is raised for indexing and lowered to engage matched face splines for precision registration with the camera. Preferably automatic exposure of a small predetermined number of frames of motion picture film follows each sectioning and staining of the work, whereby the resulting film not only records the successive exposed surfaces but may be projected to give the impression that the observer is actually moving through the work, thus permitting the investigator to trace selected elements (vascularity, neural bundles, anatomical structure, etc.) through an organ or other specimen while maintaining visual positional reference to other anatomical features.
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