Intelligence and Miscellaneous Articles. ?>11 



Thermometer 1 7c= 0-0000012179 



2 , 0-0000012245 



3 0-0000012360 



Mean .. 0-0000012351 

 M. Eeguault found directly for cold-beaten red copper 



£=0-00000:1317. 



(4) The diminution of volume varied between much wider limits 

 than Tc. The highest value I have calculated is a = 0-000865. Ad- 

 mitting this number, the greatest pressure that could be developed 

 by a deposit of copper on an absolutely resisting cylinder (m = 0) 

 would be nearly 300 atmospheres. In reality I have not yet ob- 

 served pressures above 100 or 110 atmospheres. 



I am still pursuing these researches, for which M. Jamin has 

 placed at my disposal all the resources of his laboratory. — Comjptes 

 Bmdus de VAcademie des Sciences, March 13, 1879, t. lxxxviii. pp. 

 714-716. 



NEW ESTIMATE OF SUN'S DISTANCE. 

 BY PLINY EAELE CHASE ? LL.D. 

 In accordance with the principles of my spectral harmonics, 

 Lockyer's fundamental " basic line " (4215 ten-millionth s of a mil- 

 limetre) gives the following equation : — ■ 



Earth's orbital unit_/0 radius V 

 fundamental unit \ © radius/ ' 



This gives 93,700,000 miles for Sun's distance. 



The " orbital unit " is the mean orbital movement of Earth while 

 a body at Earth's equatorial surface falls through the increment 

 of the fundamental line. 



Lockyer's "basic lines," Peirce's meteoric hypothesis, and my 

 demonstration of the influence of light in world-building and mole- 

 cular grouping lead to the equation of mass- 

 Jupiter 3 = Sun x Earth x Saturn, 

 This equation gives the following values : — 



Sun's mass = 328,600, 



„ distance = 92,549,000 miles, 

 „ parallax = 8"- 8322. 



Haverford College, Pennsylvania, Pliny E. Chase, 



March 25, 1879. 



CONTRIBUTION TO THE THEORY OF THE MICROPHONE. 

 BY HERMANN ARON. 

 The microphone is based, as is well known, upon the fact that 

 vibrations produce in it alterations of the resistance, whence arise 

 fluctuations of current which are perceived by means of a telephone. 



