Note 122 — Chapter XVII
Reading edition
Dr. M’Lelland (“Calcutta Journal of Natural History,” vol. i, p. 52), attributes the haze of the atmosphere during the north-west winds of this season, wholly to suspended earthy particles. But the haze is present even in the calmest weather, and extreme dryness is in all parts of the world usually accompanied by an obscure horizon. Captain Campbell (“Calcutta Journal of Natural History,” vol. ii, p. 44.) also objects to Dr. M’Clelland’s theory, citing those parts of Southern India which are least likely to be visited by dust-storms, as possessing an equally hazy atmosphere; and further denies its being influenced by the hygrometric state of the atmosphere.