EXPLANATION OF THE PLATES. 



PL I. Fig. 1. Represents a Comoid Cirrus. This is the variety called 



the Mare's Tail. 



Fig. 2. A Cirrus lengthened out into a long pointed tail, above- 

 it is a long straight Linear Cirrus. 



Fig. 3. Are Cumuli ; others are seen below them in the distance. 

 PL II. Fig. 1. Cirrus beginning to change to the Cirrocumulus. 



Fig. 2. The Cymoid Cirrostratus a stormy feature of the cloud. 

 Fig. 3. Nascent Cumuli forming in the top of the Stratus soon 



after Sunrise. 

 Fig. 4. A fine thin Stratus ascending in the morning. 



PL III. Fig. 1. A Cirrocumulus. 



Fig. 2. A Cirrostratus seen in profile. 



Fig. 3. A Mottled Cirrostratus, there is a cirrocumulative 



tendency in its barred nubeculae. 



Fig. 4. Another long Cirrostratus seen in profile in the horizon. 

 PL IV. Fig. 1. Another Cirrus figured like the Cyma of Architecture. 

 Fig. 2. Lines of Cirrostratus. 

 Fig. 3. The same cloud breaking out into Cirrocumulus for 



being influenced by the Cumulostratus below. 

 Fig. 4. Cumulostratus. Many of the long Cirrostrati alight on 



its summits. 



pi. V. Fig. 1. A Nimbus pouring Rain. 

 Fig. 2. The Cirrose Crown. 

 Fig. 3. A dense feature of Cirrocumulus often been bd'iui 1 



Storms. 

 Fig. 4. Little Cumuli entering the Storm from below. 



PL VI. (Frontispiece,} Fig. 1. A Halo. 



Fig. 2. A Double Halo. 



Fig. 8. A Discoid or Coronoid Halo. 



Fig. 4. A Corona or Burr. 



Fig. 5. A Parhelion. 



Fig. 0'. A Caudate Meteor or Falling Star. 



