492 



Miscellaneous Intelligence. 



in the lowest tones of his voice ; as the state necessary to produce 

 them would be that which would offer itself. 



That ordinary respiration produces no sounds does not depend 

 upon the too dilated state of the glottis, but upon the feeble impulse 

 given to the column of air traversing the larynx ; a point neglected 

 by M. Rudolphi. As to the falsette, it is produced by the anterior 

 part of the glottis, the ligaments being at such time tense and 

 drawn together, whilst the open or pectoral voice is produced by 

 the approximation of the open cords, without any simultaneous 

 tension of them. M. Liskovius contends also, that the falsette is a 

 well-characterized species of voice, and not an imperfect voice, as 

 has been supposed by Haller, Kempelin, and Rudolphi. The con- 

 clusions drawn, and principles established, are founded upon anato- 

 mical examinations of, and experiments upon, the human body. — 

 Archiv. fur Anat, 1826, p. 116. 



3. Sabulous formation in the Brain. — Dr. Bergmann, of Celle, 

 has sent a memoir to the Royal Society of Gottingen, in which he 

 describes twenty cases of earthy granulations occurring in the 

 plexus choroides of the lateral ventricals of the brains of insane 

 persons. The various lesions observed by the author in the bruins 

 of these patients, induces him to think that this plexus belongs to 

 the principal organs of the animal. The earthy granulations which 

 were found in and upon the surface of the plexus, resemble those of 

 the pineal gland. M. Stromeyer analysed both varieties, and found 

 their constitution similar, and of the following nature : — phosphate 

 of lime in large quantity, phosphate of magnesia in small proportion, 

 traces of carbonate of lime, and an animal substance of an albumi- 

 nous nature. — Bull. Univ. C. x. p. 123. 



4. Analysis of a Ferruginous Renal Calculus^ by M. Bous- 

 singault. — The calculus was sent from Bogota by Dr. Roulin, to 

 M. Boussingault ; it weighed rather more than a gramme (15.4 

 grains), was about the size of a nut, and considerably resembled 

 certain mineral states of iron sand : being analysed, it yielded the 

 following constitutents : — 



100.00 



Several other calculi of similar composition and appearance were 

 afterwards voided by the same person. — Bull. Univ. ex. p. 128. 



