Vaccination impartially reviewed : being one of the prize essays sent in to the Ladies' Sanitary Association / by Ferdinand E. Jencken.

  • Jencken, Ferdinand Edward, 1823-1881.
Date:
1868
Catalogue details

Licence: Public Domain Mark

Credit: Vaccination impartially reviewed : being one of the prize essays sent in to the Ladies' Sanitary Association / by Ferdinand E. Jencken. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    its nature and causes; we therefore at once pass over to those diseases which exert a preservative influence upon the economy, rarely occurring in the same subject more than once. These are the so-called zymotic illnesses specially incidental to childhood; they offer so wide a field for speculation in a pathological point of view, and the topic, moreover, is of such vast importance in itself, that we must be pardoned for introducing it at greater length, even at the hazard of being con- sidered somewhat prolix. The same as the crystal in the mineral kingdom is the element to which all forms, however complex, may be reduced, so in the animal and vegetable realms we may regard the cell as the earliest visible formation, out of which the manifold and marvellous structures of the living world perpetually arise. As these cells unite amongst each other by the law of attraction, a parenchema is produced, which in plants is developed into the leaf (the type of all vegetable formation), and in the animal creation expanded into membrane, the ele- ment from which all the future tissues are developed. Thus, the membranous system in general is of the most extended significance in the animal economy, partly as the foundation from out of which all organic structures have arisen, and partly because the different tissues belonging to it perform the