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density, when the whole Mass is rotating with a small Angular 



Velocity in Relative Equilibrium under its own Attraction. 1907. 



pp. 6. 8vo. IS. 

 Graves (Rt. Rev. Dr.): Focal Circles of Spherical Conies. 1889. 



pp. 19. 4to. IS. 

 Joly(C. J.): Theory of Linear Vector Functions. 1895. pp.51. 4to. 



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IS. 6d. 

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 Tarleton (F. a.): Deductions from M'Cullagh's Lectures on Rotation. 



1882. pp. 12. 4to. IS. 

 Tarleton (F. A.) : Mathematical Investigation of the Free Period of 



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