RO2 R2O5 RO3 R2O7 RO4 ----------------------------------------------- n.
their atomic weights, it will be found that nearly the same properties recur periodically throughout the entire series." The following tabular arrangement of the atomic weights shows the regular recurrence of groups (under I., II., III., IV., etc.), each consisting of members of the same natural family. The gaps in the…
ROCK n.
(M. saxatilis), and the blue rock thrush of India (M. cyaneus), in which the male is blue throughout. -- Rock tripe (Bot.), a kind of lichen (Umbilicaria Dillenii) growing on rocks in the northen parts of America, and forming broad, flat, coriaceous, dark fuscous or blackish expansions. It has been used as food in cas…
SCLEROSIS n.
ed by increase of the neuroglia and atrophy of the true nerve tissue, are found scattered throughout the brain and spinal cord. It is associated with complete or partial paralysis, a peculiar jerking tremor of the muscles, headache, and vertigo, and is usually fatal. Called also multiple, disseminated, or insular, scle…