TRANSACTIONS OF THE SECTIONS. 125 
On the Telekouphonon, or Speaking Telegraph. 
By Francis Wuisnaw, C.E., M. Inst. CE. 
The Telekouphonon is used in private establishments, warehouses, dock-yards, &c., 
for the purpose of holding a conversation between two persons at a distance from 
each other. It consists of gutta percha, caoutchouc, zinc, glass or earthenware 
piping, varying in diameter according to the required length of the pipe; terminal 
mouth-pieces of ivory, bone, hard wood, or metal, are securely attached to the pipes, 
having whistles, reeds, or other similar means of calling attention, in place of bells. 
When attention has been called, by blowing at the contrary end of the pipe, the 
whistle or reed is removed, and a conversation is readily carried on. 
A compound terminal arrangement has also been introduced, having a mouthpiece, 
and also an acoustic duct connected therewith, so that a conversation may be carried 
on without moving the mouth until the communication is completed. 
If the communication has to be transferred to a third party, an additional pipe is 
attached to the mouthpiece, and the sound being shut off from the receiving-pipe, is 
transmitted through the sending-pipe to the third party as above. 
ADDENDA. 
On the Boring of Mollusca into Rocks. By Auwany Hancock. 
On some Marine Animals from the Bristol Channel. 
By Prof. E. Forses and Ropert MacAnprew. 
On Polystomella crispa and the Classification of Foraminifera. 
By W. C. Witiiamson, F.GS. 
Mr. Lennard exhibited Microscopical Drawings illustrating the Structure of Bone. 
On the Boring of Sabelle. By the Rev. J. BRADLEY: 
—— ———— 
_ On Additions to the Fauna of Ireland. By Witi1am Tuompson, F.L.S. 
(See Annals of Natural History for this paper complete.) 
_ Mr. J. Clark noticed the occurrence of Colymbus arcticus shot near Swansea. 
