3 S ^ 3 7 
CONTENTS. 
I. The Croonian Lecture. On the Power of the Eye to adjust 
itself to different Distances , when deprived of the Crystalline 
Lens. By Everard Home, Esq. F. R. S. page 1 
II. The Bakerian Lecture. On the Theory of Light and Colours. 
By Thomas Young, M. D. F. R. S. Professor of Natural Phi- 
losophy in the Royal Institution. p. 12 
III. An Analysis of a mineral Substance from North America, 
containing a Metal hitherto unknown. By Charles Hatchett, 
Esq. F. R. S . p. 49 
IV. A Description of the Anatomy of the Ornithorhynchus 
paradoxus. By Everard Home, Esq. F. R. S. p. 67 
V. On the Independence of the analytical and geometrical Methods 
of Investigation ; and on the Advantages to be derived from 
their Separation. By Robert Woodhouse, A. M. Fellow of 
Caius College , Cambridge. Communicated by Joseph Planta, 
Esq. Sec . R. S. p. 85 
VI. Observations and Experiments upon oxygenized and hyper- 
oxygenized muriatic Acid ; and upon some Combinations of the 
muriatic Acid in its three States . By Richard Chenevix, Esq. 
F. R. S. and M. R. I. A. p. 126 
VII. Experiments and Observations on certain stony and metalline 
Substances , which at different Times are said to have fallen on 
the Earth ; also on various Kinds of native Iron. By Edward 
Howard, Esq. F. R. S. p. 1 68 
