CATALOGUE. ACUSTICS, EFFECTS OF SOUND. 



271 



«ion, even yrhen they stood on a stone pavement near each 

 other : the effects were accelerated when the communication 

 was more direct. See Timekeepers. 



*Hiulcllestone's observations on sound. Nich. 

 8. 1. 329. 



Showing the sympathy of chords and even of organ pipes, 

 materially influencing the frequency of each others vibra- 

 tions. 



Ear and Hearing. Instruments for 



Hearing. 

 Perrault on the organ of hearing. A. P. I. 



158. 

 Duverney on hearing. A. P. I. 256. 

 Duvtrnejf de I'ouie. 12. M. B. 

 Valsalva de aure. 4. Bologn. 1704. M. B. 



Acc.byDouglas.Ph.tr. 1705. XXIV. 1978. 

 Duquet's hearing trumpet. Much. A. II. 



119. 

 Duquet's chair for the deaf. Mach. A. II. 



129. 

 £lair on the organ of hearing in elephants. 



Ph. tr. 1718. XXX. 885. 

 Mai ran on the ett'ect of sound on the ear. 



A. P. 1737.49. H.97. 

 Leprotti on the perforation of the membrana 



tympani. Coil. Acad. X. 518. 

 On a perforated membrana tympani. C. Bon. 



I. 350. 



The hearittg unimpaired. Rivinus called it his foramen. 

 Martiani's model of the ear. A. P. 1743. H. 



85. 

 NoUet on the hearing of fishes. A. P. 1743. 



199. 



Brocklesby's extract from Klein on the hear- 

 ing of fishes. Ph. tr. 1748. 233. 



Arderon on the hearing of fish. Ph.tr. 1748. 

 149. 



Thinks that river fish have no hearing : observes, that 



sound is transmitted but faintly through water. A hand 



grenade bursting under Water produced prodigious tremors. 



Geoffroy on the hearing of reptile*. S. E. II. 



164. 



Haller. Physiol. V. 



Camper on the hearing of fishes. S. E. VI. 



177. 

 Elliot on vision and hearing. 8. 

 Vicq D'Azyr on the ear of birds. A. P. 1778. 



381. H.5. 

 Hunter on the organ of hearing in fish. Ph. 



tr. 1782.379. 



Shows that they hear. 

 Galvani on the ear of birds. C. Bon. VI. O^ 



420. 

 *Scarpa de auditu et olfactu. f. Pav. 1789- 

 Comparetti de aure interna. 4. Pad. 1789- 



R. S. 



Extr. Roz. XLII. 344. 

 Brunelli on the hearing of reptiles. C. Boo. 



VII. O. 301. 

 Lentin on deafness. Commentat. Gott. 17^1. 



XI. Ph. 39. 

 Caldani suUa m«mbrana del timpano. 8. Pad». 



1794. R. S. 

 Home on the membrana tympani. Ph. 4r. 



1800. 1. Nich. V, 93. 



Cooper on the destruction of the membrana 

 tympani. Ph. tr. 1800. 151. Nich. 8. I. 

 102. 



Cooper on an operation for deafness. Ph. tr. 



1801. 435. 



On hearing by the teeth. B. Soc. Phil. n.41. 



Nich. IV. 383. 

 Beaumont's hearing instrument approved^. 



M. Inst. IV. 

 Gilb. X. 567. 



The deaf sometimes hear acute sounds. 



Gough on the method of judging of the po- 

 sition of sonorous bodies. Manch. M. V.. 



Thinks the bones of the head assist us in forming the judg- 

 ment. A sound just audible at 240 feet was distinguished, 

 as being nearer at 40 feet than at 42. A horizontal angu^ 

 lar difference of 8° was perceptible, an elevation of 10°. 



On the invisible girl. Nich. 8. IIL 56.. 



