March 20th 1876

Two dishes of water (ww') were used - First salt water was used and secondly dilute sulphuric acid. Sounds were heard from E but much more faintly than I had expected. The instrument shown in Fig 2 was also used as a Receiver but I could not obtain nearly such a good sound as with the single wire (see Fig. 1 page 40) Points pp'p2p3 were of platinum. The platinum wire used was much finer than that employed on March 10th.
The sound was not so loud as that obtained on March 10th, nor