Note 173 — Chapter IX · FACULÆ AND PROMINENCES.
Reading edition
Deslandres, Comptes Rendus, t. cxiv. No. ii.; Journ. Brit. Astr. Ass. vol. ii. p. 237.
Reading edition
Deslandres, Comptes Rendus, t. cxiv. No. ii.; Journ. Brit. Astr. Ass. vol. ii. p. 237.