378 



CATALOGUE. — DIVISIBILITY OF MATTER. 



Lam6tlierie on the elements. Roz. XVIII. 



224. - 

 Lametherie on the Kantian system of forces. 



.Tourn. Fhys. XLVII. (IV.) 383. Ph. M. 

 , II. 277. 

 Le Sage Lucr^ce Newtonien. A. Berl. 1782. 



404. 

 In favour of the impulse of atoms. 



L'huilier Exposition des principes des cal- 



culs. 4. Berl. 1786. 1«7. 



DeUic Idees sur la meteorologie. 



Wall on attraction and repulsion. Manch. 



M. II. 439. 

 In most cases considers apparent repulsion as elective 



attraction, 



Ilutton's mathematical dictionary. Art. Ele- 

 ment. 



Selle on elements. A. Berl. 1796. ii. 42. 



Gilbert on attraction. Gilb. II. 63. 



Les causes materielles do ['attraction devoilees. 

 12. Lond. 1801. 



Cavallo's natural philosophy. 



Divisibility of Matter. 



Boyle on effluvia. 



Halley on the thickness of gold on wire. 

 Ph.tr. 1G93. XVII. 540. 



Calculates that it is 



i of an inch. 



Reaumur on ductility. A. P. 1713. 199. 



H.9. 

 Keill de materiae divisibilitate infinita. Ph. 



tr. 1714. XXIX. 82. 

 Keill's natural philosophy. 

 Bohault's physics. 

 S'Gravesande's natural philosophy. 

 Musschenbroek Introductio. 

 Hutton's recreations. IV. 80. 

 Nicholson. Ph. tr. 1789. 286. 



Gold leaf 



Ph. M. IX. 



In gilding buttons 5 grains of gold are allotted by act 

 of parliament to 144 buKons ; but they may be tolerably 

 gilt by half the quantity. The thickness in this case would 

 be about jyiora °f ^" inch. 



Musschenbroek says, that a workman of Augsburg drew 

 a grain of gold into a wire 500 feet long. Its diameter 

 must have been only j^ of an inch. Of a silkworm's 

 thread 360 feet weigh a grain ; of a spider's web only ^ as 

 much, consequently 12800 feet weigh only a grain. 



In drawing gilt wire, 4 5 marcs or 22l pounds of silver are 

 covered to the thickness of j|o of an inch with 6 ounces of 

 gold : but one ounce is sufficient for the purpose : this is 

 drawn into a wire 06 leagues long, and when flattened it 

 becomes 1 1 leagues : the gold is then j^^^ of an inch 

 thick; if one ounce only has been used, j^jfedoj and pro- 

 bably in some parts jjcfe^ : this may still be flattened 

 again and reduced to the thickness of —515535 of an inch in 

 all parts, and in some to still less, not exceeding one ten 

 raillionth. Montucla and Hutton. A sphere of this thick- 

 ness would contain about one two thousand million million 

 millionth of an inch. 



Repulsion, or Impenetrability. 



See Collision. 



Hooke on the compression of glass. Birch. 



I. 129. 

 Hooke's Lectures of spring. L. C. 1678. 



With fundamental experiments. 



On the compressibility of water. A. P. I. 



139. 



Varignon on hardness A. P. II. 70. X. 49. 



Romberg on the change of volume of li- 

 quids in a vacuum. A. P. II. 183. 



Hauksbee on the degree of contact of a body 

 immersed in a fluid. Ph. tr. 1709- XXVI. 

 306. 

 Finds that it is very intimate. 



Euleron pneumatics. C. Petr. II. 347. 

 • Euler on the nature of the air. A. Petr. III. 



i. 162. 



Supposes molecules of air to revolve within vesicles of 

 water more rapidly as the temperature is higher. 



Euler. A. Petr. 1779- i. 



