. Scientific American Volume 88 Number 12 (March 1903). lasseswore them fastened around their arms and throatsas charms to ward off evil and certain diseases. Thereare two puzzling and extremely interesting problemswhich have not, as said, been solved by archaeologists and other investigators of jadeite, viz., the localitywhere it was obtained or mined, and how the ancientlapidaries carved, drilled, and sawed this hard stonjfrom blocks. It is certain that an enormous amountof skill and time was employed in their blade of a modern steel knife will hardly producean impression on t
. Scientific American Volume 88 Number 12 (March 1903). lasseswore them fastened around their arms and throatsas charms to ward off evil and certain diseases. Thereare two puzzling and extremely interesting problemswhich have not, as said, been solved by archaeologists and other investigators of jadeite, viz., the localitywhere it was obtained or mined, and how the ancientlapidaries carved, drilled, and sawed this hard stonjfrom blocks. It is certain that an enormous amountof skill and time was employed in their blade of a modern steel knife will hardly producean impression on the polished surface. No drills, grav-ing or incisive tools giving a clue to the methods ofmanufacturing them have as yet been found. Cortez,it is claimed by early writers, took back to Spain,among his loot and spoils, some of the rarest and bestspecimens in the country of jadeite. Some were especi-ally cut and elaborately carved to order. These werepresented as a gift to his wife, whose casket of jewelswas said to have been the finest of any womans in. CARVED JADE ORNAMENTS. Spain. Prof. Saville, through the generosity of theDuke of Loubat, who has done more than any othermodern explorer in uncovering the monuments andculture of Mexicos ancient civilization, is confidentthat in his future excavations and researches in theState of Oaxaca, he will undoubtedly come across thewhereabouts of the long hidden jadeite mines andthrow new light upon the mysterious and lost art ofworking this brilliant and precious stone. Fahrenheits Thermometer. Writing in Knowledge on the history of Fahrenheitsthermometer, Prof. Cleveland Abbe, of the UnitedStates Department of Agriculture, says: There is everyevidence that the Fahrenheit scale began with his useof plus 90 as the upper limit of the temperature of thehuman body, and minus 90 for the lowest temperatureof the air in Europe, and also the temperature obtainedby the mixture of salt and ice. Fahrenheit subse-quently used a second scale in whic
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