The Encyclopedia Americana, Volume 7Grolier Incorporated, 1996 - Encyclopedias and dictionaries |
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Page 91
... clocks were scaled - down versions of public clocks , but without astronomical indica- tions . They had iron frames and wheels , and usu- ally a striking mechanism or an alarm . The weighted bar controlling the timekeeping was soon ...
... clocks were scaled - down versions of public clocks , but without astronomical indica- tions . They had iron frames and wheels , and usu- ally a striking mechanism or an alarm . The weighted bar controlling the timekeeping was soon ...
Page 94
CLOCK Terry & Andrews clock with an ogee style case and a 30- hour stamped brass works ; Bristol , Conn . , about 1840 ... clocks that are sought after by collectors . In the 1840's Chaun- cey Jerome began the manufacture and export to ...
CLOCK Terry & Andrews clock with an ogee style case and a 30- hour stamped brass works ; Bristol , Conn . , about 1840 ... clocks that are sought after by collectors . In the 1840's Chaun- cey Jerome began the manufacture and export to ...
Page 95
... clock more accurate than the Shortt clock . In 1942 the Greenwich Observatory replaced its Shortt clocks with quartz crystal clocks . The most accurate clocks utilize the oscilla- tions of atoms and molecules for regular motion . These ...
... clock more accurate than the Shortt clock . In 1942 the Greenwich Observatory replaced its Shortt clocks with quartz crystal clocks . The most accurate clocks utilize the oscilla- tions of atoms and molecules for regular motion . These ...
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19th century Africa American Atlantic cod became Bogotá born Britain British central church civil Clark Clay Cleisthenes Cleveland climate clocks cloture cloud clubs coal coal tar Coast Guard coeducation coffee coinage coins coke College Colombia colonies color Colorado Columbia Columbus comets comic commercial common cold common law Commonwealth COMMONWEALTH OF NATIONS Communist Party countries courts died early East economic elected Empire England English established Europe European federal France French important India Indian industry institutions John known land later latitudes major manufacturing ment meters miles montmorillonite mountain Museum National North Ocean organization period plant political Population president produced reform region River Roman served social South southern Soviet Soviet Union species temperature tion trade treaty Union United University usually West western World World War II York York City