184 CATALOGUE. — PHILOSOPHY AND ARTS, PRACTICAL MECHANICS. 



Haynani's gage for cutting wheels. S. A. Helmstadt. Raisin's automaton harpsichord was found to 

 XVII 325 contain an infant performer. 



Donkins's table of the radii of wheels. Nich. 

 VI. 86. Union of Flexible Fibres. 



(E. M. M.") Various manufactures. E. M. 

 WheelwoTk with Appendages. Manufactures, arts, et metiers, par Roland 



See Jointed Work, Cranks. d* ^ Plati^re. III. t. 1785—91. 



Deparcieux on the form of the undulations 



for raising stampers. A. P. 1747. 243. H. 



121. 

 Garousse's tooth wheeled lever. Mach. A. II. 



15. 17. Lever with a hook. 19. 

 Gensanne's lantern substituted for cranks. 



Mach. A. VII. 105. 



Friction of Wheelwork. 

 See removing weights. 



Coulomb on the friction of pivots. A. P. 



1790. 448. 



The friction varies nearly as the pressure. Pivots run 

 with less friction on garnet than on agate : a perfect polish 

 reduces the friction to i or j of what is usual in ordinary- 

 work. For the point of a cone of steel bearing less than loo 

 grains, the best angle is 10° or 12° ; when the weight is 4 

 or soo or more, about *i°. 



Machinery for Entertainment. 



Maillard's artificial swan. Mach. A. VI. 133. 

 Gondola with an artificial horse. 137. 



Tumbling figures. Mussch. Introd. I. pi. 11. 



Ferguson's mechanical paradox. Mech. 

 exerc. 44. 

 Wheels moving in contrary directions. 



Automatons. E. M. Physique. Art. Auto- 

 mate. 



Vaucanson's flute player, piper, and duck. 

 Montucla and Lalande. III. 802. 803. 

 These machines were purchased by Professor Bayreuss of 



2 



ISIaterials. 



Animal. 



Aglionby on the nature of silk. Ph. tr. I699. 



XXI. 183. 

 Bon on the silk of spiders. Ph. tr. 1710. 



XXVII. 2. 

 Daubenton on the magnitude of the fibres of 



wool. A. P. 1775. l.H. 1. 



The fibres of superfine wool arc ^5 of a line in diameter, 

 or ^. E.I. 



Daubenton on the new wool. "A. P. 1785. 



454. 

 Silkworms. E. M. A. VIII. Art. Vers^soie. 

 Silk. E. M. M. II. Art. Soie. 

 Wool. E. M. M. I. Art. Moutons. Laine. 

 Hair. E. M. M. I. Art. Poll. 

 Intestines. E. M. M. III. Art. Boyaudier. 

 Leather. E. M. M. III. 

 Swayne's apparatus for rearing silkworms. 



S. A. VII. 148. 

 Chappe on a transparent texture derived from 



the silkworm. Ann. Ch. XI. 113. 

 Silk gut. Hochheimer. Ph. M. I. 3G8. 

 Des Lozieres on animal cotton. Nich. 8. IV. 



Ph. M. XIX. 120. 



Vegetable. 

 Cloth of the bark of the genista. C. Bon. 



IV. o. 349. 



Cerati on the bark of the broom. A. P. 1763. 

 H. 52. 



