 | William Nicholson - Natural history - 1809 - 726 pages
...straight; seeds mithose of Villette, and Tschirnhansen, and the new complex one of M. de Buffon. That of M. de Villette, was three feet eleven inches in diameter, and its focal distance was three feet two inches. Its substance -is a composition of tin, copper, and tin-glass.... | |
 | Edward T W. Polehampton - 1815 - 688 pages
...distance of 15 feet; of Settala, of Vilette, of Tchirnhausen, of Buflbn, of Trudaine, and of Parker. That of M. de Villette was three feet eleven inches in diameter, and its focal distance was three feet two inches. lU substance a a composition of tin, copper, and tin.glass.... | |
 | Edward T W. Polehampton - 1815 - 712 pages
...of 15 feet ; of Settala, of Vilette, of Tchirnhausen, of Buffon, of Trudaine, and of Parker. , That of M. de Villette was three feet eleven inches in diameter, and its focal distance was three feet two inches. Its substance it a composition of tin, copper, and tin-glass.... | |
 | William Nicholson - Natural history - 1819 - 412 pages
...greatest eminence arc, those of Villette and Tschirnhauscn, and the new complex one of M. de Uuffon. That of M. de Villette was three feet eleven inches in diameter, and its focal '.istance was three feet two inches. Its -instance is a composition of tin, copper, •«mi... | |
 | Colin MacKenzie - 1821 - 724 pages
...distance of 15 feet ; of Settala, of Vilette, of Tchirnhausen, of Buffon, of Trudaine, and of Parker. That of M. de Villette was three feet eleven inches in diameter, and its focal distance was three feet two inches. Its substance is a composition of tin, copper, and bismuth.... | |
 | George Crabb - Industrial arts - 1830 - 438 pages
...by some historians be true, for we are informed that Archimedes set fire to the fleet of Marcellus when he was besieging Syracuse; and that Proclus in...thirty-four minutes; a diamond weighing four grains lost seveneights of its weight. That of Buffon was a polyhedron, six feet broad, and as many high, consisting... | |
 | George Crabb - Industrial arts - 1830 - 380 pages
...towards a common point, called the focus. The burning glass of M. de Villette was three feet elevei Inches in diameter, and it burnt at the distance of...thirty-four minutes ; a diamond weighing four grains lost seven-eighths of its weight. That of Buffon was a polyhedron, elx feet broad, and as many high, consistIng... | |
 | George Crabb - Industrial arts - 1830 - 384 pages
...glass, commonly spherical, which collects the rays of the sun towards a common point, called the focus. The burning glass of M. de Villette was three feet...melted a silver sixpence in seven minutes and a half ja King George's halfpenny in sixteen minutes, which ran in thirty-four minutes ; a diamond weighing... | |
 | John Lauris Blake - Encyclopedias and dictionaries - 1834 - 1028 pages
...spherical, which collecta the rays of the sun towards a common point, called the focus. The burning-glues of M. de Villette was three feet eleven inches in...inches ; by it were melted a silver sixpence in seven minutée and a half; a King George's half-penny in sixteen minutes, which ran in thirty-four minutes... | |
 | George Crabb - Industrial arts - 1835 - 378 pages
...the rays of llie sun towards a common point, called the focus. The burning glass of M. do Villetto was three feet eleven inches in diameter, and it burnt...thirty-four minutes ; a diamond weighing four grains lost seven-eighths of its weight. That of Button was a polyhedron , six feet broad, and as many high, consisting... | |
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The burning glass of M. de Villette was three feet eleven inches in diameter, and it burnt at the distance of three feet two inches; by it were melted a silver sixpence in seven minutes and a half; a King George's halfpenny in sixteen minutes, which ran... 