CONTENTS. 
XIV. On the coagulation by heat of the fluid blood in an aneu- 
rismal tumour. By Sir Everard Home, Bart. V. P. R. S. 
Communicated January 23, 1826. - - page 189 
XV. On the mathematical theory of suspension bridges , with 
tables for facilitating their construction. By Davies Gilbert, 
Esq. V.P.R.S. &c. Communicated March 9, 1826. 202 
XVI. On magnetic influence in the solar rays. By Samuel 
Hunter Christie, Esq. M. A. F.R.S. of Trinity College , 
Cambridge ; Fellow of the Cambridge Philosophical Society : 
of the Royal Military Academy . Communicated November 15, 
1825. - - - - _ 21 o 
XVII. On the mutual action of sulphuric acid and alcohol , with 
observations on the composition and properties of the resulting 
compound. By Mr. Henry Hennell, chemical operator at 
Apothecaries 3 Hall. Communicated by W. T. Brande, Esq. 
Sec. R S. - - _ - 240 
XVIII. On a method of expressing by signs the action of 
machinery. By Charles Babbage, Esq. F. R. S. Commu- 
nicated January 17, 1826. - 250 
XIX. On the parallax of the fixed stars. By J. F. W. Herschel, 
Esq. M. A. Sec. R. S. Communicated January 19, 1826. 2 66 
