— 
Sas 
Miscellanies. 393 
as to destroy the fish. Another at St. Hubert was Guiehiedl in 18 
days, 123 feet deep, and produced a a fine fountain, er rose 4 feet 
above the surface. 
At the place Saint Gratien, in‘the city of Tours, the most remark- 
able well was bored which M. Degoussée had ever accomplished. 
At the depth of 320 feet, the first sheet of ascending water was at- 
tamed. A second was reached at 364 feet ; and finally, a third, at 
about 400 feet, which issued with impetuosity about 5 feet above the 
surface, carrying with it’ a great quantity of green sand. ‘This well 
was to be furnished with a tube of copper throughout its whole ex~ 
tent, 4 inches in diameter. It discharged 38 gallons per minute, 
having the temperature of 62 Fahren.; and by extending the tube, 
the water rose 22 fect above the pavement, and more thew 50 feet 
above the channel of the Seine. » The value of such a well to the 
city being incalculable, the authorities engaged the engineer to es- 
tablish two others; and several neighboring proprietors determined to: 
a, elves of his skill on their estates. This well was the first 
eh the borer had penetrated, with seb success, _— 
throw oe chalk. —Bul. via: Dec. 1830 . 
2. On seis metallic wires and springs.—A bar of steel or: 
" iron, after being sufficiently hammered or subjected to the action of 
fire, becomes successively yellow, violet, blue, grey and white. The 
variations in degree of these processes will partly depend upon the 
state and quality of the metal operated upon. . Although philosophers _ 
are agreed that all hard bodies are’elastic, yet hardness does not 
Constitute the measure of elasticity, fora glass ball is much more 
elastic than an equal globe of cast iron; but their difference of hard- 
ness is by no means proportioned to that of their elasticity. A Da- 
mascus or Moorish sword blade is more springy or elastic than an- 
other, which shall notwithstanding make an impression upon the 
edge of the former. This difference arises from the varied mode | of 
tempering the respective blades. The steel or iron, after each transi~ : 
tion above noticed is said, by the French, to become revenu. 
M. Le Roy, pére, the celebrated watchmaker of Louis XV, in- 
forms us that he took three wires of common steel, to which he sus- 
pended weights, and put them ina pendulous motion. They did 
hot maintain their vibrations beyond seven minutes. He then tem- 
pered them to the fourth, or grey state; in this stage of revenu the same 
Wires maintained the vibrations of their masses during the space of 
