TABLE OF CONTENTS 



NEW SERIES, VOL. II., PART I. 



rAGE. 



Eainfall in CHfton. G, F. Burder, M.D , F.M.S 1 



On Professor Abbe's method of testing tbe optical quality of Micros- 

 cope Objectives. By H. E. Fripp, M.D 3 



On Phenomena of Interference in the Microscope. By H. E. Fripp, M.D. 12 



On Diffractive Spectra in the Microscope. H. E. Fripp, M.D 24 



Geology of the Bristol Coal-field [Part 5.] W. W. Stoddart, F.O.S., 



F.C.S , 39 



Geology of the Bristol Coal-field [Part 6.] W. W. Stoddart, F.G.S., 

 F.C.S 4S 



The Mammoth Cave of Kentucky. E. Wethered, F.C.S., F.G.S. ... 56 



Notes on the Metals found near Bristol. W. W. Stoddart, F.G.S., F.C.S. 68 



A Deep Section in Old Market .Street. W.'W. Stoddart, F.G.S., F.C.S. 77 



The Scientific Aspects of Tanning. By "W. Evans 79 



REPORTS OF MEETINGS AND EXCURSIONS. 

 General 96 



Botanical Section 102 



[Authors alone are responsible for the various statements and opinion* 

 contained in their respective papers.] 



