
February 5, 1881 Scientific American
NEW MICROPHONE.
BY M. BOUDET, OF PARIS.
This microphone, with multiple contacts, as shown in the accompanying figure, is composed of a mouthpiece, E, affixed to the end of a glass tube, T, one centimeter in diameter, itself fixed on a jointed stand, thus enabling the whole apparatus to be moved at any inclination.
Scientific American July 25, 1896
Wood Cut
Machine cuts, binds and carries the bound bundle into windrows.
Scientific American July 25, 1896
Wood Cut
The First Placing of men upon the machine to do the binding.