1851 Great Exhibition: Official Catalogue: Class X.: M. Marriott
341. MARRIOTT, M., Montpelier Square — Inventor.
Balance for chemical analysis; the beam, made of pine, weighs less than one-third of an ounce; when loaded with 1,000 grains in each scale it will turn with the 1/200th of a grain, and with the 1/100th of a grain when light.