NEW CLOUD CLASSIFICATIONS. 
85 
Classification of Clouds according to Rev. Clement Ley, “Cloudland,” pp. 26, 27. 
26 Types. 
Clouds of radiation: 
Nebula, fog. Nebula stillans, wet fog. 
Nebula pulverea, dust fog. 
Clouds of interfret: 
Nubes informis, scud. 
Stratus quietus, quiet cloud. 
Stratus lenticularis, lenticular cloud. 
Stratus maculosus, mackerel cloud. 
Stratus castellatus, turret cloud. 
Clouds of inversion: 
Cumulo-rudimentum, rudiment 
cloud. 
Cumulus, heap cloud. 
Cumulo-stratus, anvil cloud. 
Cumulo-nimbus, shower cloud. 
Nimbus, rainfall cloud. 
Clouds of inclination: 
Nubes fulgens, luminous cloud. 
Cirrus, curl cloud. 
Cirro-filum, gossamer cloud. 
Cirro-velum, veil cloud. 
Cirro-macula, speckle cloud. 
Stratus prsecipitans, plane shower. 
Cumulo-stratus-mammatus, tuber- 
culed anvil cloud. 
Cumulo-nimbus grandineus, hail 
shower. 
Cumulo-nimbus nivosus, snow 
shower. 
Cumulo-nimbus mammatus, fes¬ 
tooned shower cloud. 
Nimbus grandineus, hail-fall. 
Nimbus nivosus, snow-fall. 
Cirro-velum mammatum, draped 
veil cloud. 
Ley’s classification recognizes the principle of origin. 
The first cause of formation, called radiation, corresponds 
to the division in our scheme called cooling by contact. 
Perhaps the right term to employ would be “ contact and 
radiation,” and what we have called mixture, Ley calls 
“ interfret,” and our “ ascension ” is called “ inversion.” A 
fourth cause, which is called inclination, we find it hard to 
place. It concerns the highest clouds of all, such as the 
cirro-filum and the luminous clouds. Finally, in order to 
get at the cloud’s true meaning we must, in addition to 
equipping our observers with nephoscope and cloud atlas, 
12—Bull. Phil. Soc., Wash., Vol. 13. 
