“I have a distinct recollection of the Telephone. We had a small private club meeting once each month for scientific purposes. On referring to my note-books, I find that there was a meeting on Thursday evening, October 5th, 1865. It was held in Nassau Street, at the residence Mr. Horatio Yeates, now in Australia, and brother of Mr. Stephen Yeates. The Telephone was upstairs, in the third story of the house, and the voice heard in the hall. Mr. Vereker, of the Bank of Ireland, Mr. John Rigby, of rifle celebrity, the two Mr. Yeates, and, I think, Mr. Tuke, were present with myself. There were some others, whom I cannot now recollect, but our club was small. “Rigby sang ‘Patrick’s Day’ and ‘God save the Queen,’ and various questions were asked and answered. The separate words were most distinct, the singing less so; but there was no difficulty in recognising the individual who spoke by his voice. “Being much interested in the subject, I got Mr. Yeates to allow the apparatus to be shewn at a Conversazione (Presbyterian Young Men’s) at the Rotunda on October 12, at 8 P.M. His assistant, Mr. Tuke, took charge of it that night. It was placed in a side room off the main round room of the buildings. “I exhibited at the October 5th meeting of our club a specimen termed ‘Locust gum,’ probably derived from some _Robinia_, but really can tell you nothing more about it. There is merely a brief note of it in my private memoranda. “Yours, dear Sir, Believe me very truly, “William Frazer, “Fellow and Examiner, Royal College of Surgeons, “Ireland, Member of Council, Royal Irish “Academy, &c.” “Silvanus P. Thompson, Esq., University College, Bristol.” APPENDIX I. COMPARISON OF REIS’S TRANSMITTERS WITH RECENT INSTRUMENTS.