OBITUARY NOTICE. 409 



as mutual exponents," which was followed by another on the 

 same subject in 1856. In 1857, a paper "On the functions of 

 the tympanum" was also read before the Royal Society. These 

 three papers are published in the "Proceedings of the Royal 

 Society." Among his other medical papers which are mostly 

 inserted in medical journals and proceedings of kindred societies, 

 the following will give a good example of the Author's 

 investigations: — "The Eustachian Tube, why opened in deglu- 

 tion", 1856; " Entacoustics," 1868; "The Eustachian Tube, 

 when and how it is opened," 1869; "Pains in the abdominal 

 and thoracic walls," 1861 ; " Ophthalmoscopic muscse volitantos 

 in a very myopic eye," 1861 ; " Medicine as influenced by 

 scientific tendencies," 1861; and "On Entoptics," 1859. So 

 much interest was taken by physicians in Dr. Jago's paper on 

 Entoptics, that he was encouraged to continue his investigations 

 on this subject, which resulted in the publication of a separate 

 treatise in 1864, entitled, "Entoptics, with its uses in physiology 

 and medicine." While engaged on this important work, Dr. 

 Jago exerted himself to produce a real treatise, in which, while 

 giving his own views in some detail, he does not fail to make 

 the reader acquainted with the views of other writers. The 

 work is a masterly exposition of a difficult subject, especially as 

 the Author has ventured on untrodden ground, while investigat- 

 ing and suggesting explanations of phenomena relating to the 

 subject, which had not hitherto been sufficiently accounted for. 

 Dr. Jago evidently brought many original thoughts to bear on this 

 difficult question. These attracted the notice of some of the 

 leading scientific members of the profession, as tending to 

 physiological conclusions which would probably lead to a correct 

 solution. Among those who were specially interested in Dr. 

 Jago's investigations, was Dr. William Sharpey, F.E.S., then 

 one of the Secretaries of the Eoyal Society, through whose 

 influence principally, Dr. Jago was elected on June 2nd, 1870, 

 a Eellow of the Eoyal Society. One of his proposers was Sir 

 Charles Lemon, Bart., whose signature appeared first on the 

 original certificate of candidature, which had been suspended in 

 the rooms of the Society a few years before his election. 



Dr. Jago was also an occasional contributor to the "Reports" 

 and "Journal of the Eoyal Institution of Cornwall." Of these 



