CONTENTS. 



VI. The Elementary Composition of Nitroglycerine. By Matthew 

 Hay, M.D., and Okme Masson, M.A., B.Sc, . 



VII. Report on the Tunicata collected during the Cruise of H.M.S, 

 " Triton " in the Summer of 1882. By W. A. Herdman, D.Sc. 

 Professor of Natural History in University College, Liverpool 

 (Plates XVI.-XX.), . . . . " . ' 



PAGE 



PART I. (1882-83.) 



I. The Pycnogonida dredged in the Faroe Channel during the Cruise 

 of H.M.S. " Triton " (in August 1882). By Dr P. P. C. Hoek, 

 Member of the Royal Academy of Science of the Netherlands. 

 (Plate L), ... 1 



II. Bright Clouds on a Bark Night Sky. By Professor C. Piazzi Smyth, 



Astronomer-Royal for Scotland. (Plates II.-XIV.), . 11 



III. Note on the Little b Group of Lines in the Solar Spectrum and the 



New College Spectroscope. By C. Piazzi Smyth, Astronomer- 

 Royal for Scotland. (Plate XV.), . . . .37 



IV. Observations on the Annual and Monthly Growth of Wood in 



Deciduous and Evergreen Trees. By the late Sir Robert 

 Christison, Bart., and Dr Christison, . . . .45 



V. A Contribution to the Chemistry of Nitroglycerine. By Matthew 

 Hay, M.D., Assistant to the Professor of Materia Medica in 

 the University of Edinburgh, . . . . .67 



78 



93 



VIII. Report on the Pennatulida dredged by H.M.S. " Triton" By A. 

 Milnes Marshall, M.D., D.Sc, M.A., Fellow of St John's 

 College, Beyer Professor of Zoology in Owens College. (Plates 

 XXI.-XXV.), . . . . . .119 



