Inquiry into the nature and cause of miasmata, more particularly illustrated in the former and present state of the Campagna di Roma / P. Murphy.

  • Murphy, Patrick, 1782-1847.
Date:
1825
Catalogue details

Licence: Public Domain Mark

Credit: Inquiry into the nature and cause of miasmata, more particularly illustrated in the former and present state of the Campagna di Roma / P. Murphy. Source: Wellcome Collection.

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

    73/186 (page 51)
    Classification of Clouds. 5! cloud, being simply the consequence of the con- densation commenced in the Cirrus, requires no particular comment. The Cumulus, Cirro-Cumulus, and Cirro-Stratus, are usually the remains of the former, or rain- cloud, particularly after storm, and are seen in the evening congregated in masses towards the verge of the horizon. The Stratus, or night-cloud, which, in summer, both precedes and accompanies fair weather, appears to owe its origin to the suspension of the upright or ascending current of the atmosphere (which current will be found treated of more par- ticularly in a subsequent article), in the absence of the sun, when that part of it about the curve of congelation, reverting on the region immediately below, and combining with its caloric, forms a sheet of light vapour, which the first rays of the sun are sufficient to dissipate; the harmony, or equipoise, of the atmosphere, not being affected by it.