Lessons in practical hygiene for use in schools / by Alice Ravenhill ; with preface by M.E. Sadler.

  • Alice Ravenhill
Date:
[1907]
Catalogue details

Licence: In copyright

Credit: Lessons in practical hygiene for use in schools / by Alice Ravenhill ; with preface by M.E. Sadler. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    four, and a further deduction of 160 c.c. (10 cubic in.) m respect of his age. The boy's vital capacity should theoreti- cally therefore amount to 2,444 c.c. (159 cubic m.). (B) Test the accuracy of any theoretical calculation of individual vital capacity by the following experiment :— Procure a large jar, of which the capacity is about 4,000 c.c. (1 gallon), and fill it with water. Fit to this a rubber cork pierced with two holes, [a), {b). Pass a short piece of glass tubing through'(a), and through {b) pass a long piece, which should reach almost to the bottom of the jar° connect to its external end a sufficient length of rubber tubing to hang over the brim of an empty basin, placed beside the jar. Take the deepest possible inspiration, and do not expire until the lips are in contact with the short tube in (a). Then expire through the tube as forcibly and for as long a period as possible. Measure the water driven out of the jar by the breath. The amount of water expelled into the basin will represent the amount of the respiratory or vital capacity. To attain a fairly accurate result, repeat the experiment several times and on two or three occasions, until, with practice, the quantity of water expelled and measured amounts to about the same on three or four successive trials ; this quantity may be then fairly assumed to represent the vital capacity of the individual. VII.—Dissection of a Sheep's or Pig's Lungs. Materials: Shee})'s or jnifs luntjs; -pair of bellows; rubber tube; water. Apparatus ; Dissecting instruments ; board ; larrje glass tube ; pinch-cock ; small bowl. [A] Take the lungs and trachea provided, and notice their different parts:— (1) The size, shape, colour, texture and number of lobes in each lung, and the smooth, moist, glistening pleura with which they are invested.
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