Miscellanies. 399 



odor again appeared at six hundred feet, without the presence of 

 any sulphurous compound that would account for its origin. — Bib. 

 Univ. Mai. 1834. 



Remark. — Upon the data slated above; at a little over two miles 

 below the surface, water would boil ; at about ten miles, the earth 

 would be red hot, and probably at the depth of two hundred or 

 three hundred miles, it would be in igneous fusion. There is, 

 however, no certainty, that the heat increases in the same ratio to 

 unknown depths, and the phenomena of volcanoes, prove, that not 

 only the ignition but free fusion approximate to, and actually reach 

 the surface, even in very high mountains. — Ed. 



23. Water obtained by Boring. (J. G.) — Artesian Wells have 

 been very successfully constructed in some parts of France. A letter 

 from M. Jauhnrt de Passa to Viscount Hericart de Thury, de- 

 scribes a bored well, remarkable for the abundance of water which 

 it supplies. It was made by M. Durand, two leagues south east of 

 Perpignan. 



The sound after penetrating to the depth of eighty feet, through 

 alternate beds of marl and clay entered a bed of sandy marl, three 

 feet thick, where issued a jet of water, very clear, but from the 

 peculiarity of its taste, unfit for drinking. Its temperature was 14°.5 

 Reaumur, (=65° Fahrenheit,) and it rose from three to four feet 

 above the surface. 



A second boring, undertaken at the distance of six feet from the 

 first, gave, at the same depth, a jet of water, but the first jet dimin- 

 ished, and the quantity of water from both, was less than that which 

 first issued from the former. The boring of the latter was then con- 

 tinued to the depth of one hundred forty five feet, when the sound 

 began to sink of itself, and when precipitately withdrawn, the water 

 rushed up, to the height of five feet, and astonished all by its abun- 

 dance and force. No obstacle could restrain it. No direct attempt 

 was made to determine the maxinmm height to wliich it might rise, 

 but fifty feet was decreed to be fully within the limits of its ascend- 

 ing force. 



At the time the letter was ^vl•itten, several weeks after the first issue 

 of the water, it continued to flow \\\xh the same violence, and with 

 rather increased quantity. From the dimensions and velocity of 

 the current, it appeared to supply four hundred thirty gallons -per 



