38^ 



CATALOGUE. — COHESION. 



meter, adhered to mercury with a force of 194 grains, a 

 disc of talc with 119, of tallow 49, of paper i7j, of wax 11, 

 of box, waxed, with a force of i onl)". 



Godaixl on apparent attractions. Roz. XIII. 



473. 

 ^leister on oil swimming on water. Coiu- 



menlat. Gott. 1778. I. 35. 

 Besile on the cohesion of liquids. Roz. 



XXVIII. 171. XXIX. 287, 339. XXX. 



125. 



Gives 82 gr. Fr. for the cohesion of 25 square lines of 

 mercury, 8^ for water. In some cases the apparent ad- 

 hesion was diminished under the air pump. But this was 

 probably the effect of the extrication of air bubbles. 



*Monge on apparent attractions and repul- 

 sions. A. P. 1787. 506. Nich. HI. 269. 



Supposes that the superficial particles of the fluid only 

 act in producing the effects of cohesion, and infers that the 

 curve must be a lintearia. But he has not filled up this 

 true outline with equal success. Spirit of wine, when not 

 too hot, forms floating globules when dropped through a 

 capillary tube. Two dry bodies floating approach each 

 other from an inequality of pressure ; even under the sur- 

 face, as the fingers under mercury. A dry and a moist 

 body repel each other in the same manner as an inclined 

 place and a body placed on it would separate. Two wet 

 bodies are drawn by the fluid between them as by a chain. 

 But these explanations do not agree with the supposition of 

 the lintearia, which is vertical at its origin. The distance 

 of two plates being ^ of a line, the height of the water was 

 15j lines, at^, the height was 33J, at Jj, 74 lines. 



Bennet on attraction and repulsion. Manch. 

 M. III. 116. 



Shows that the undulations observed by Franklin do not 

 depend on the mutual action of matter. 



Banks on the floating of cork balls. Manch. 

 iM.UI. 178. 



Explains the phenomena pretty correctly, after S'Graves- 

 ande. 

 Waterproof cloth. Ph. M. X. 370. 



Impregnated with some substance not highly attractive 

 of water. See cloth. 



Carradori on the superficial adhesion of 

 fluids. Journ. Phys. XLVIII. 287. Ph, 

 M. XI. 27. Gilb.'xil. 108. 



Considers it as a mechanical atuaction between oils and 



water. 



Otto on the effiect of oil on waves. Zach. 

 Eph. II. 516. III. 242. Ph. M. IV. 225. 



Leslie on capillary action. Ph. M. XIV. 

 193. 



Hassenfratz on the eflfcct of adhesion in de- 

 termining specific gravities. Ann. Ch. 

 Gilb. I. 396,515. 

 Pounded glass appearing to be specifically lighter. 



Schmidt on Hassenfratz'is experiments. Gilb.. 

 IV. 194. 



Denies their accuracy. 



B. Prevoston the motions of floating bodies. 



Ann. Ch. XI. 3. 

 Milon on capillary tubes. Journ. Phys. LIV. 



128. Gilb. XII. Repert. XVI. 427. 

 Found that the cleanest mercury, when hot, would not 

 rise even in red hot lubes. 



Von Arnim. Gilb. IV. 376. 



Finds an effect from the length of a capillary tube. 

 H'allstrom on the rise of water in tubes. Gilb. 



XIV. 425. 



Attributes the apparent effect of the length of a capillary 

 tube to the circumstance of its being sucked with the lipt, 

 which, even when the lips were perfectly clean, appeared 

 to produce a depression. In general it is probable that in- 

 equalities in the dimensions of the bore have been the cause 

 of the irregularity, which has never been perceptible in ex- 

 periments with flat plates. Water rose 11.7 lines Swedish 

 in a tube .2 line in diameter. 



Cavallo's Nat. Phil. II. 135, 139. 



A small globule of mercury will be drawn away from 

 paper by glass, and from glass by more mercury. An iron 

 ball floating on mercury is surrounded by a depression. 

 A drop of mercury recedes from the line of contact of two 

 glass plates. A needle floats on water when dry, but if 

 any water gets over it, it sinks. 



Robison observes that insects, which walk on water, have 

 their feet wetted by a spirituous solution, and sink. 



The equation of the surface of a drop of water is 

 aaxx + aajiy ~ xyyi, where x z: o. Or thus, a*x'x' + 

 la*xif'x + (a' — x'y') t/* — x'y'i'ir* 3; o, Y. The series 

 given by Euler, A. Petr. III. 188, for the clastic curve, 

 might be applied to the simple lintearia, which is a species 

 of it. 



