James Lind was the pioneer of naval hygiene in the Royal Navy. By conducting what was perhaps the first ever clinical trial, he proved that citrus fruits cure scurvy. He also proposed that by distilling sea water you could obtain fresh water. Moreover he fought for the drying of ships by better ventilation, improved clothing and cleanliness of the sailors and introduced fumigaton with sulphur and arsenic. Wikipedia
The definitive Wikipedia entry for James Lind. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/James_Lind