154 New Scientific Books. [Feb. 



with five times its weight of sulphur, and heated to whiteness in a bent 

 glass tube. The resulting sulphuret of chrome was blackish-grey 

 colour ; it is unctuous to the feel, very light, and readily falling to 

 powder; when rubbed on bodies, it leaves marks similar to those of 

 plumbago. Heated in a platina crucible, it burns like pyrophorous, 

 giving fumes of sulphurous acid, and leaving deep-green coloured 

 oxide of chrome. It is not readily acted upon by nitric acid : but 

 when this acid is mixed with muriatic, it is easily dissolved. It is 

 composed of chrome, 100; and sulphur, 10 54. By mixing equal 

 parts of chromate of potash and sulphur, and heating the mixture in 

 close vessels, green oxide of chrome was economically obtained by 

 M. Lassaigne. It is to be washed with water to dissolve the sulphate 

 and sulphuret of potash, which leaves the oxide of chrome pure. 

 Equally fine oxide of chrome was obtained by heating sulphur with 

 the produce of the evaporation of the solution of chromate of iron, 

 treated by nitre, to which a little sulphuric acid had been previously 

 added to precipitate the earthy matters which had been dissolved. 



Owing to a mistake of the engraver, it has been found requisite to give 

 a next) Plate of Mr. PraWs Clinometer, iv/iich the reader is requested to 

 substitute for that in the last number of the Annals. 



Article XVII. 

 NEW SCIENTIFIC BOOKS 



PREPARING FOR PUBLICATION., 



Dr. Good is preparing for publication, The Study of Medicine, 

 comprising its Physiology, Pathology, and Practice. These volumes, 

 in addition to that lately published on Nosology, and dedicated, by 

 permission, to the College of Physicians, will complete the Author's 

 design ; and constitute an entire body of Medical Science, equally 

 adapted to the use of Lecturers, Practitioners, and Students. 



Travels in Syria and Mount Sinai, by the late J. L. Burckhard, are 

 in the press. 



A work, entitled " Practical Economy, or Hints for the Applica- 

 tion of Modern Discoveries to the Purposes of Domestic Life,'* is pre- 

 paring for publication. 



Mr. Haden, of Sloane-street, is about to publish a Monthly Journal 

 of Medicine, addressed principally to unprofessional persons. The 

 work will teach the prevention rather than the cure of disorders ; at 

 the same time that it will point out how the friends of the sick may, in 

 the best way, assist their medical men in his treatment, and otherwise 

 show how health may be preserved, and disease warded off. 



JUST PUBLISHED. 



An Inquiry into the Nature and Treatment of Gravel, Calculus, and 

 other Diseases connected with a deranged Operation of the Urinary 

 Organs. By William Prout, MD. FRS. 8vo. 7^. boards. 



