

SCIENCE OF AGRICULTURE 



Pari II 



electricity. The firsl successful attempt to arrange the diversified forms of clouds, under 

 a few general modifications! was made by Luke Howard, Esq. We shall give here a 

 brief account of his ingenious classification. 



2357. The simple modification! are thus named and defined: — 1. Cirrus, parallel, 

 rlcxuous, or diverging fibres, extensible in any or in all directions (jig. 207. a. J; 



207 



8 



2. Cumulus, convex or conical heaps, increasing upwards from a horizontal base (6) ; 



3. Stratus, a widely-extended, continuous, horizontal sheet, increasing from below (c). 

 2358. 7V intermediate modifications which require to be noticed are, 4. Cirro-cumulus, 



small, well defined, roundish masses, in close horizontal arrangement (d) ; 5. Cirro- 

 stratus, horizontal, or slightly inclined masses, attenuated towards a part or the whole of 

 their circumference, bent downward or undulated, separate, or in groups consisting of 

 small clouds having these characters e). 



'_':i5P. The compound modifications are, 6. Cumulo-stratus, or twain cloud ; the cirro- 

 stratus blended with the cumulus, and either appearing intermixed with the heaps of the 

 latter, or superadding a wide-spread structure to its base ( f) ; 7. Cumulo-cirro-stratus, 

 in Nimbus ; the rain-cloud, a cloud or system of clouds from which rain is falling. It 

 is a horizontal sheet, above which the cirrus spreads, while the cumulus enters it laterally 

 and from beneath (gig)] 8. The Fall Cloud, resting apparently on the surface of She 

 ground (/j). 



