[PrevPage] [INDEX ] [INDEX ]  Volume 1   15 Apr. 1876    Page 107  [Source] [ NOTES ]
    in one place a process was at work that suggested a means of depositing copper upon a plumbago surface.
    I wrote upon the card shown in Fig 2 ­ with a soft lead pencil. Then immersed the card in a saturated solution of sulphate of copper ­ and sprinkled some iron-filings upon it. Copper was deposited Writing Sample upon the plumbago surface as shown in Fig 2. I tested the conducting surface to see whether a Morse sounder could be worked through it upon Stanley's plan. I find it can.
    Experiments were made with Prof. Horsford this evening ­ but we failed to have copper deposited so successfully as in the above.

    Noted by A.G.B.
    April 16th 1876
    M.G.H. April 16th
[PrevPage] [INDEX ] [INDEX ]  Volume 1   15 Apr. 1876    Page 107  [Source] [ NOTES ]