JOHNSON, Frank Grant, inventor, born in East Windsor, Connecticut, 30 January, 1835. He was graduated at Wesleyan university in 1849, taught, and studied medicine in North Providence, Rhode Island, and Wethersfield, Connecticut, and received his degree from Castleton medical college, Vermont, in 1851. He practised his profession in Brooklyn, New York, in 1852-'6, and still (1887) resides in that city. He has taken out about 100 patents for his inventions, which include philosophical charts for schools, unpickable locks, water metres, the revolving book case, an automatic dredging bucket, steel railroad-ties, and passenger elevators. He has published "The Water Metre and the Actual Measurement System" (New York, 1862), and "The Nicholson Pavement, and Pavements Generally" (1867); "Health Lifts" (1877); and "Infected Air and Disinfectants" (1884).