184 OUTLINES OF NATURAL PHILOSOPHY. 



clination of its axis, or the angle which it makes 

 with the vertical, and as this is the same law that 

 regulates the vibrations of a pendulum in a small 

 arch of a circle, a pendulum may be found, the 

 vibrations of which are isochronous with the small 

 vibrations of a floating body. 



ATWOOD, Phil. Trans, ubi supra, p. 123. BOUGUEK, 

 Manoeuvre des Vaisseaux, lib. i. iii. chap. 7. 



On the subject of this section, see also EULER/S Theo- 

 ry of the Construction and Properties of Vessels, 

 translated by H. WATSON, chap. 4, 5, & 6., &c. 

 GREGORY'S Mechanics, vol. i. 



SECT. III. 



PHENOMENA OF CAPILLARY TUBES. 



271. JLF a capillary tube of glass, that is, a tube 

 of which the bore is less than one-tenth of an 

 inch, be immersed in water, the water will rise 

 within the tube to a greater height than it stands 

 at on the outside ; and this height is nearly in the 

 inverse ratio of the diameter of the tube. 



a. The amount of this ascent is very differently stated 

 by different authors. The latest and most accurate 



experiments 



