204 



HA RD WICKE'S SCIENCE- G OS SIP. 



ON SOME TYPES OF STORM-CLOUD. 



NORMAL Electric Cumulus. — This variety 

 I have formerly described, in the "Transac- 

 tions of the Meteorological Society," and cited 



ous tint, and repulsive force in relation to contiguous 

 masses (see Science-Gossip, July, 1887). 



II. Bag, or Festoon Cloud. — This is a kind of 

 inverted cumulus. It does not seem to occur except 

 during the actual disturbance, and may be supposed 





' . ~1L d 



Fig. 114 — Normal Electric Cumulus. 



Fig. 115. — Dropping Cumulus. 



V 



m&//i///§lllli"'"' 



y 



y 



Fig. 116. — Bag or Festoon Cloud. 



" 



Fig. 117.— Saw Cloud. 



some varieties in a paper in " Popular Science 

 Review," and Science-Gossip, 1879. The chief 

 characteristics are : Height, extent, hardness and 

 curling, or nodulous form of outline, pale or sulphur- 



to have its origin in strong [rotary currents. The 

 cloud often forms the under surface of a nimbus 

 pallium, or sheet.J, It is rare in its perfect foims, 

 but is! almost circular at times, g Characteristics — 



