(Encyclopedia) encaustic, painting medium in which the binder for the pigment is wax or wax and resin. Examples of encaustic tomb portraits from Roman Egypt bear witness to the durability of the…
(Encyclopedia) Siegbahn, Karl Manne Georg, 1886–1978, Swedish physicist. In 1913, he began a series of experiments that led to the discovery of the M series of X rays and demonstrated the shell…
(Encyclopedia) photostatphotostatfōˈtəstătˌ [key], reproduction of any printed or simple black-and-white material, such as drawings or manuscripts, made by the Photostat, a photographic camera. While…
(Encyclopedia) Goodyear, Charles, 1800–1860, American inventor, b. New Haven, Conn., originator of vulcanized rubber. He failed in his earlier business ventures and was in jail for debt when he began…
(Encyclopedia) germination, in a seed, process by which the plant embryo within the seed resumes growth after a period of dormancy and the seedling emerges. The length of dormancy varies; the seed of…
(Encyclopedia) amylaseamylaseămˈəlāsˌ [key], enzyme having physiological, commercial, and historical significance, also called diastase. It is found in both plants and animals. Amylase was purified (…
(Encyclopedia) CiliophoraCiliophorasĭlˌē-ŏfˈərə [key], phylum in the kingdom Protista consisting of the ciliates, or ciliophores, complex freshwater or saltwater protozoans that swim by the…
(Encyclopedia) cire perduecire perduesēr pĕrdüˈ [key] [Fr.,=lost wax], sculptural process of metal casting that may be used for hollow and solid casting. The sculptor makes a model in plaster or clay…
(Encyclopedia) North, Douglass Cecil, 1920–2015, American economic historian, b. Cambridge, Mass., Ph.D. Univ. of California, Berkeley, 1952. North was on the faculty at the Univ. of Washington,…
(Encyclopedia) Brady, Mathew B., c.1823–96, American pioneer in photography, b. Warren co., N.Y. Brady learned the daguerreotype process from S. F. B. Morse and in 1844 opened his own photographic…
