APPARATUS FOR MEASURING TENSILE STRENGTHS. 389 



XXVIII. — Onan Apparatus forMeasuring Tensile Strengths, 

 especially of Fibres, By Charles O'Neill, Esq._, F.C.S. 



Eead November 17th, 1863. 



In the sketch of the apparatus,, A is a tin vessel to hold 

 water, provided with a cock, C. B is a hollow cylin- 

 der of glass or metal, closed permanently at the lower 

 end, and so weighted as to float vertically in stable 



equilibrium with about one-eighth of its length out of 

 water ; at the upper end, a hook or other contrivance is 



