Lavoisier was a protected cruiser of the French Navy built in the 1890s, the third and final member of the . Ordered as part of a large construction program aimed at countering the fleets of France's rivals, the Linois class was intended for use with France's fleets in home waters and in the French colonial empire. Lavoisier was armed with a main battery of four guns, was protected by an armor deck that was thick and she had a top speed of .
The ship spent the first few years of her career operating with the French Mediterranean Squadron, where she conducted training exercises. In 1903, she began a decade of service with the Newfoundland and Iceland Naval Division, where she typically patrolled the fishing grounds from April to September before returning to France, where she would be decommissioned for the winter. These deployments sometimes included visits to Norway, and some years, after returning to France in September, Lavoisier would be transferred to the Moroccan Naval Division until the next fishing season necessitated her return to the North Atlantic.
Lavoisier was attached to the 2nd Light Squadron in the English Channel at the start of World War I in August 1914, but she saw no action there. She was transferred to the eastern Mediterranean in December 1915, operated briefly with the main French fleet, and then conducted anti-submarine patrols in the western Mediterranean. In 1917, she returned to the Moroccan Naval Division, and the following year, she was reassigned to the Syrian Naval Division, where she remained through the end of the war. In April 1919, Lavoisier was detached from the Syrian Division; decommissioned for the last time in August, she was struck from the Navy Directory in early 1920 and sold to ship breakers.
Design
In response to a war scare with Italy in the late 1880s, the French Navy embarked on a major construction program in 1890 to counter the threat of the Italian fleet and that of Italy's ally Germany. The plan called for a total of seventy cruisers for use in home waters and overseas in the French colonial empire. The Linois class was ordered as part of the program, and the design was based on the earlier .
Lavoisier was long overall, with a beam of and a draft of . She displaced . Her crew varied over the course of her career, amounting to 250–269 officers and enlisted men. The ship's propulsion system consisted of a pair of triple-expansion steam engines driving two screw propellers. Steam was provided by sixteen coal-burning Belleville type water-tube boilers that were ducted into two funnels. Her machinery was rated to produce for a top speed of . Her cruising range was at a speed of ; at full speed, her range fell to .
The ship was armed with a main battery of four 45-caliber guns in individual pivot mounts, all in sponsons located amidships with two guns per broadside. These were supported by a secondary battery that consisted of a pair of guns, one at the bow and the other at the stern. For close-range defense against torpedo boats, she carried eight 3-pounder Hotchkiss guns, two guns, and four 37 mm Hotchkiss revolver cannon. She was also armed with four torpedo tubes in her hull above the waterline. Armor protection consisted of a curved armor deck that was thick, along with plating on the conning tower.
Service history
Construction – 1902
Work on Lavoisier began with her keel laying at the Arsenal de Rochefort shipyard in Rochefort in January 1895. She was launched on 17 April 1897, was commissioned for sea trials on 1 December, and was completed in April 1898. On 19 April, the ship received orders to join the Mediterranean Squadron, France's primary battle fleet, and take the place of the cruiser . She got underway with a partial crew on 28 April and arrived in Toulon on 3 May; there, she received her full complement by taking men from Cosmao. She participated in the fleet maneuvers that year, which lasted from 5 to 25 July. On 18 November, she conducted speed comparison tests with her sister ship . Lavoisier remained in the unit in 1899, which passed uneventfully, apart from having been sent to represent France at a sail regatta at Monaco on 13 March.