Excerpt from The Scientific Works of C. William Siemens, Kr;, F. R. S., D. C. L., LL. D., Civil Engineer, Vol. 3: A Collection of Addresses, Lectures, Etc
L'histoire de toutes les inventions importantes est l'histoire d'un progres graduel et d'une perseverance eclairee de la part des entrepreneurs. Pour ma part ja'i devoue a cette affaire non seulement la plus grande partie de mon temps (et mon temps est un capital daus la position ou je me trouve), mais ja'i devoue encore tout l'argent que j'ai tire de la Societe et celui de mes moyens particuliers. Je crois qu'il m'est permis de faire valoir cette circonstance, plutot personnelle, melee a un rapport officiel parceque je la regarde comme un titre a votre confiance, et comme une assurance pour la reussite complete de notre entreprise.
Deep Sea Telegraphs.
By C. W. Siemens.
On coming forward to address you on the subject of deep-sea telegraphs, it is necessary for me, in the first place, to define my subject by drawing the distinction between deep-sea lines and submarine telegraphs in general.
The characteristics of a shallow sea-line are, firstly, that the iron sheathing usually applied has abundant strength to support the cable during the operation of submersion, as also for raising the same again to the surface for the purposes of repairs; secondly, that it admits of being divided into sections of convenient lengths for the transmission of messages; and lastly, that it lies within reach of abrasion from currents, or even ships anchors, and has to be made strong enough to resist these mechanical agencies.
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