INSTRUCTIONS FOR THE USE OF THE ARCTIC 

 EXPEDITION, 1875. 



CONTENTS. 



PART I.~FHYSICAL OBSERVATIONS, 



I. — Astronomy. 



Page 



1. Astronomical Data. (Eclipses of the Sun and Occultations.) By 



J. R. Hind, F.R.S., Superintendent of the Nautical Almanac 1 



2. Suggestions for Observations of the Tides. By the Rev. Prof. 

 Haughton, M.D., E.R.S. ----- 5 



3. Pendulum Observations. By Prof. G. G. Stokes, M.A., Sec. R.S. - 8 



4. On the Detection of Meteoric (Cosmical) Dust in the Snow of Arctic 

 Regions. By Prof. H. E. Roscoe, B.A., E.R.S. - - - 10 



II. — Terrestrial Magnetism. 



1. On Determination of Elements and use of Magnetical Instruments. 

 By Prof. J. C. Adams, M.A., E.R.S. ; and Capt. E. J. O. Evans, 

 R.N., C.B., E.R.S. 11 



III. — Meteorology. 



1. Meteorological Instructions. By Robert H. Scott, E.R.S., Director 



of the Meteorological Office - - - - - -14 



2. Note on Auroral Observations. By Prof. Stokes, M.A., Sec. R.S. 19 



IV. — Atmospheric Electricity. 



1. Instructions for the Observation of Atmospheric Electricity. By 

 Prof. Sir William Thomson, LL.D., E.R.S. - - - - 20 



V. — Optics. 



1. Spectroscopic Observations. Observations of the Spectrum of the 



Sun and of the Aurora. By Prof. G. G. Stokes, M.A., Sec. R.S. - 24 



2. Polarisation of Light. By W. Spottiswoode, M.A., Treas. R.S. - 26 



3. Instructions in the use of the Spectroscopes. By J. Norman 

 Lockyer, E.R.S. - - - - - - - 28 



VI. — Miscellaneous Observations. 



1. On Saline Matter in Ice. By Dr. Rae, E.R.G.S. - - - 32 



2. Hints towards Observations in the Arctic Regions. By Prof. 

 Tyndall, D.C.L., E.R.S. 34 



3741 <^ 



