18 



THE VOYAGE OF H.M.S. CHALLENGER 



earth, it is not intended to exclude the view that solar influence may have a small 

 share in producing the observed phenomena. 



In concluding this Eeport it may be remarked that however subsequent research 

 may add to, qualify, or reverse, the conclusions drawn from the observations made 

 during the voyage of the Challenger, substantial gains have been won for the science of 

 terrestrial magnetism, forming a sound basis for future magneticians to build upon. 

 The labours of those who planned and started the system of magnetic observations of 

 this voyage, as well as of those who so zealously carried it out, have borne good fruit, of 

 which it may be reserved to others to reap the full benefit. 



