David Logan was born on August 24, 1850, in Pictou, Nova Scotia.

He was the proprietor of D. Logan & Co., a wholesale and retail grocer store on Water Street in Pictou, Nova Scotia.

In 1876, he married Jenny Leetch (1855-1907). He died on February 4, 1937, in Pictou, Nova Scotia.

Otto Loewi, b. June 3, 1873, Frankfurt am Main; d. Dec. 25, 1961, New York City; German-born American physician and pharmacologist; shared Nobel Prize for Physiology or Medicine in 1936 for discoveries relating to chemical transmission of nerve impulses.

Sir Oliver Joseph Lodge was born on June 12, 1851, in Penkhull, Staffordshire, England.

He was a British physicist, educator, and author. In 1865, he left his schooling and entered his father's business (Oliver Lodge & Son) as an agent for B. Fayle & Co. selling Purbeck blue clay to the pottery manufacturers until 1873. He obtained a scholarship to the Royal College of Science, London (1872-1873). Lodge studied advanced mathematics at the University of London (B.Sc., 1875; PhD. in science, 1877). He lectured at Bedford College, London (1879-1880), and in 1881, he became Professor of Physics and Mathematics at the newly founded University College, Liverpool. In 1900, he was appointed the first principal of the new Birmingham University, remaining there until his retirement in 1919. He identified electromagnetic radiation independent of Hertz's proof and at his 1894 Royal Institution lectures ("The Work of Hertz and Some of His Successors"), Lodge demonstrated an early radio wave detector he named the "coherer". His experiments led to the invention of practical wireless telegraphy or the radio. He served as President of the Liverpool Physical Society (1889-1893) and President of the British Association (1912–1913). He was awarded the Rumford Medal of the Royal Society in 1898 and was knighted in the 1902 Coronation Honours. In 1898, he was awarded the "syntonic" (or tuning) patent by the U.S Patent Office. In 1901, he was elected as a member of the American Philosophical Society. He believed the mind lives on after death and wrote 40 books on this and related subjects including "Raymond, or Life and Death" (1916), which gained popular interest, especially in the paranormal world.

In 1877, he married Mary Fanny Alexander Marshall (1851–1929). He died on August 22, 1940, in Lake, Wiltshire, England.

Henry Cabot Lodge was born on May 12, 1850, in Beverly, Massachusetts.

He was an American Republican politician, historian, and statesman. In 1872, he graduated from Harvard College. In 1874, he graduated from Harvard Law School and was admitted to the bar in 1875, practising in Boston. After traveling through Europe, Lodge returned to Harvard, and in 1876, became one of the first recipients of a Ph.D. in history. He was elected a Fellow of the American Academy of Arts and Sciences in 1878. In 1881, he was elected a member of the American Antiquarian Society. He served in the US Senate from 1893 to 1924 and is best known for his positions on foreign policy. His successful crusade against Woodrow Wilson's Treaty of Versailles ensured that the United States never joined the League of Nations and his reservations against that treaty influenced the structure of the modern United Nations.

In 1871, he married Anna Cabot Mills Lodge (1851–1915). He died on November 9, 1924, in Cambridge, Massachusetts.

Charles Dealtry Locock was an English essayist, translator of Swedish poetry, and writer on chess and croquet. He also edited the poetry of Shelley.

James R. Lockhart was born in Bristol, New Brunswick. He enrolled at McGill University around 1912, but left off his studies at the outbreak of the First World War. He was a Private in the original unit that staffed the No. 3 Canadian General Hospital formed by McGill University in France. There, he met his first wife, Nursing Sister Anne Elliot from Wingham, Ontario, whom he married in 1922. Lockhart returned to McGill as a medical student in 1918 and graduated in 1921. During his early career, he practiced in Edmundston, NB, and Wingham, ON. In the 1930s, Lockhart established a medical practice in Carleton County, New Brunswick, where he participated in founding a private hospital in the village of Bath. He remarried twice and died 1980.