DAGUERREOTYPE n.
An early variety of photograph, produced on a silver plate, or copper plate covered with silver, and rendered sensitive by the action of iodine, or iodine and bromine, on which, after exposure in the camera, the latent image is developed by the vapor of mercury.
DEAD a.
tion of coal tar, and containing phenol, naphthalus, etc. -- Dead plate (Mach.), a solid covering over a part of a fire grate, to prevent the entrance of air through that part. -- Dead pledge, a mortgage. See Mortgage. -- Dead point. (Mach.) See Dead center. -- Dead reckoning (Naut.), the method of determining the…