This section is from "The Horticulturist, And Journal Of Rural Art And Rural Taste", by P. Barry, A. J. Downing, J. Jay Smith, Peter B. Mead, F. W. Woodward, Henry T. Williams. Also available from Amazon: Horticulturist and Journal of Rural Art and Rural Taste.
The permanence of certain types of plants, commonly classed among esculents, is too generally believed. This exaggerated, not to say erroneous, opinion has been prejudicial to all attempts to improve particular vegetables. In the carrot, for instance, the variety having a white skin would seem to have been condemned for ever; except, perhaps, the white carrot of Bretenil. Yet it is clear that we do not know the innumerable atmospheric influences, as well as those which relate to situation and soil; all which may considerably ameliorate or improve the types of our commonest vegetables. With this view M. Barthel, Sen., of Mulhouse, has lately succeeded in raising a very interesting novelty in the form of a white transparent carrot. It only resembles the other white varieties in size. It is distinguished by its roots being of moderate length, its earliness, and especially by having the appearance of pure white wax overlaid with a coating of shining varnish. Its leaves are short, finely cut, the collar (formed by the stalks of the leaves) is slender and inserted in a deep cavity.
In point of flavor it comes near the red varieties, a circumstance that will render the transition between the red and those commonly called white, more natural.- Revue Horticultural