Telegraphic Transmission of Pictures

1881 Scientific American  
against gas, advantages and disadvantages are both obvious: on the one side, a whiter light, freedom from heat anel vitia tion of the air, from foul smells <lnd Illrnish; on the other, the inability to store the supply agaiIlst the time of need, the rather grealer liability to interruption by accident, and the difficulty of graduating the brightness of a given lamp in an economical manner.
doi:10.1038/scientificamerican06181881-4544bsupp fatcat:abxqzhedrzbnza6dpe3kwevpm4