Sputum : its microscopy and diagnostic and prognostic significations / by Francis Troup.

Date:
1886
Catalogue details

Licence: Public Domain Mark

Credit: Sputum : its microscopy and diagnostic and prognostic significations / by Francis Troup. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    and are mortised and screwed into a circular block of wood, two inches thick and nine in diameter. Half way between bottom and summit there is also a strong triangular board, to the squared-off corners of which the legs are also fastened by screws, so that the whole affair is stoudy compacted together. In the centre of these two binding boards a bar of wood, two and a half inches square, plays up and down according to the level wished, and is provided with a series of holes two inches apart, through which a pin can be thrust, and thus support the bar on the crown of the stand ; a pinching-screw at the side is an additional precaution against any altera- tion of level. To the summit of this pillar the long flat board which is to carry the lamp and microscope and camera is fixed securely, not directly, but through the medium of two boards, the upper of which is much broader and longer than the under one; in fact, between them they exactly represent the capital of a pillar : greater freedom from vibra- tion is thus attained. At one end there is a slightly raised rest for a broad-wick paraffin lamp, with a row of little nails which mark out the position for the lamp-stand, and keep it in the optical axis of the microscope. The microscope on its flat pedestal is fixed to the board by means of a pinching-screw, and is also kept in proper position by two pieces of wood, against which its rest travels when moved backwards or forwards as desired ; the slot in the board in which the pinch- c