The main problem is that my link to the first photograph of Touraine was leading nowhere. The FrenchLines website, supposedly an archive and resource on the subject of La Compagnie Générale Transatlantique and its ships, has removed its page on Touraine. There is no longer a link from La Touraine in the list of CGT's vessels to a page of her own, and the entry in the list is the only reference on the site.
This is what I said in the original post:
French Lines is an organisation dedicated to the preservation of that sector of France's nautical history relating to the great maritime companies from 1850 to the present day, not just documents, photos and films, but complete collections of transatlantic passenger lists, posters, furniture, uniforms, logs, jewellery....The deleted page contained brief facts and figures from Touraine's first transatlantic voyage from Le Havre to New York, leaving her home port on 20 June 1891, to her last at the end of 1922, and her last voyage of all, leaving Le Havre on 25th November 1923 for the breaker's yard in Dunquerque.
So much for dedication.
I have therefore substituted a splendid early postcard of Touraine from Creative Commons licenced by www.estampemoderne.eu.
Secondly, the name of the Le Havre laboratory scientist taking part in the investigation of the fire aboard the Touraine was not Sarnac, but Sanarens. He was the director of the laboratory.
You can find the revised version of the post here.