Catalogue. — heat and cold. 



383 



Fluidity of Liquids, and Firmness of Solids. 



See heat. 



Ductility. See Divisibility. 



Boyle fluiditatis et firmitatis historia. Works!. 

 I. 240. 



Reaumur on the ductility of different sub- 

 stances. A. P. 1713. 199- H. 9. 



Reaumur. A. P. 1726. 243. 



Lead is rendered less sonorous by hammering. 



Fluidity. A. P. 1741. H. 11. 

 Beguelin on hard bodies. A. Berl. 1751.331. 

 On the explosion of grindstones. A. P. 1762. 

 H. 37. 1768. H. 31. 



Attributed to the efFect of the centrifugal force, and to 

 the expansion of the wooden wedges. 



Fontana on solidity and fluidity. Soc. Ital. 



1.89. 

 On hammering. Sickingen liber die platina. 



115. 

 Coulomb on the force of torsion. A. P. 1784. 



229. 



The force varies as the angle of deviation, and as the 

 biquadrate power of the diameter of the wire ; a weight of 

 half a pound vibrating twice as fast as a weight of two 

 pounds. Steel wire was 3^ times as stiff as brass ; its direct 

 cohesive strength as 12 to 7 ; it was 18 or 20 times as stiff 

 as a thread of silk : brass wire was less easily deranged by 

 great torsion. The elasticity of annealed wire was the same 

 in quantity as that of unannealed, but its extent of action 

 was reduced from 11 to 6 or 7 , in copper : the time of 

 oscillation was exactly the same in both «ases. P. 26», 



Coulomb's physical theory of friction. S. 



E. X. 1785. 254. 

 Lambert on the constitution of fluids. A. 



Berl. 1784. 299- 

 *Delangez on the statics and mechanics of 



semifluids. Soc. Ital. IV. 329. 

 llutton on the flexibility of the Brazilian 



stone. Ed. tr. III. 86. 

 Fleuriau on elastic stones. Roz. XLI. 86, 91' 

 On Fleurlau's mode of making marble fle.v- 



ible by heat, producing partial separations. 



Ph. M. X. 277. 



Link on fluidity. Ann. Ch. XXV. 113. 

 On springs. Ph. M. II. 67. 



Springs of metal soon break, or take a set, if suffered to 

 vibrate; wooden springs break if stopped and not suffered 

 to vibrate. Red deal is the best wood for springs. 



Cr}stals slowly formed are the hardest. See Higgins on 

 light. 



The cohesive strength depends much onsoliditj. See 

 cohesion. 



HEAT AND COLD. 



Boyle on cold. Works II. 228. 



Ace. Ph. tr. 1665-6. I. 3. 

 Boyle de frigore. 4. Lond. l6S3. 

 Petit sur le froid et le chaud. Par. I67I. 



M. B. 



Ace. Ph. tr. 1671. VI. S043. 

 Dodart on heat and cold. A. P. I. 143. 

 Mariotte on heat and cold. A. P. I. I74. 



Oeuvr. I. 183. 

 Varignon on fire and flame. A. P. II. 171. 

 Malebranche on fire. A. P. I699. 22. H. 17, 

 f Geoffrey on cold. A. P. 



Ace. Ph. tr. 1701. XXII. 951. 

 Lemery on the matter of fire. A. P. 1709. 



400. H. 6. 

 Boerhaave de igne. Elementa chemiac. I. 



116. 

 Winkler de frigore. 4. Leipz. 1737. 



Martine's medical and philosophical essays. 



Chatelet Dissertation sur le feu. 8. Par. 1744. 



Euler, Du Fiesc, Crequi, Chastelet, and Vol- 

 taire on fire. A. P. Prix. IV. 



Kraft on cold and heat. C. Petr. XIV. 218. 



Bikkcr de igne. 4. Utrecht, 1756. 



Hillarij on fire. 8. Lond. 176O. 



Belgiado del calore e dtil freddo. Parma, 

 1764. 



Inqiiirj/ into the effects of heat. 8. Lond. 

 .1770. 



Herbert de igne. 8. Vieun. 1773. 



