582 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



ent ; and, second, because colors equally good for calico could 

 be obtained by other less expensive and less dangerous meth- 

 ods. The colors in question were named light scarlet pig- 

 ment, scarlet ponceau, dark green and steam chocolate, and 

 catechu pigment, all containing arsenious oxide, which is sup- 

 posed to have been added for the purpose of giving body to 

 the pigment, not being essentially necessary to the color. It 

 is thought very probable that these are used extensively in 

 the manufacture of paper-hangings. 1 A, Aug. 30, 1872, 105. 



NATURE OF CROUP. 



- 



Dr. Jordan, in a recent lecture upon croup, as reported in 

 the Medical Times and Gazette, takes occasion to refute the 

 hypothesis that croup is the result of membranous exudation 

 in the larynx or trachea, and maintains that whenever this 

 occurs the actual disease is diphtheria. The usual cause of 

 croup is a membranous inflammation of the mucous mem- 

 brane of the larynx and trachea?, accompanied with secretion 

 of tenacious mucus, and also considerable swelling, caused by 

 effusion into their submucous areolar tissue in fact, a ca- 

 tarrhal inflammation of the larynx and trachea?. The chief 

 danger of the disease is in consequence of the obstruction to 

 the entrance and exit of air to and from the lungs, which 

 frequently requires a very prompt treatment. For this the 

 patient is to be placed in a warm room having no draughts, 

 at a temperature of at least 70 Fahr. The air breathed is to 

 be thoroughly saturated with moisture, this being sometimes 

 accomplished very effectually by the steam from a boiling 

 kettle in the room. 



Whatever application be adopted, it is to be remembered 

 that the soft moist vapor is an important agent in the treat- 

 ment. A linseed poultice to the throat helps, and has a 

 soothing power. These external applications being attended 

 to, an emetic of ipecacuanha is then to be given, and rej^eated 

 every twenty minutes or half hour until not only copious 

 vomiting but copious perspiration is induced. The result of 

 this is to cause the secretions of the air-passages to become 

 thinner and more easily got rid of, a looser cough always be- 

 speaking a lessened danger. Other modifications of the treat- 

 ment are, of course, to be suggested by the attendant physi- 

 cian. 20 A, August 31, 1872, 221. 



