Chemistry and Physics. 477 
air over the apparatus. Si a ohana upon the 
observatory of the University and at t odimonte in Naples, 
also at the observatory upon Vesuvius. ge mse distant observa- 
tions upon the little St. Bernard and in Moncalieri have impressed 
the author with the belief that with dry clear air, in which the 
pe eeten of + electricity is regular, the strength of the influ- 
nee diminishes with increasing height.—Beibldtter Physik und 
‘Chemie, vol. ii, no. 3, i 5. us 
10. Floating Magnet —Nature, for May 2, contains a 
3 Sir William homens son, in which he observes that Professor 
a 
a: iootog: sonata ee Professor A. M. Mayzr. 
(From a ag er to the Editors, dated South Orange, New Jersey, 
ay 21, 1878.)—I was much gratified to cate that my experi- 
interes 
covered a week or agi apr I sent you the Aes note shuns these 
experiments, published on page 276. These laws are as follows: 
the configurations of the floating magnets - divided es prim- 
ary, secondary, pares quaternary, etc., classes, and the con- 
figurati ons of one class form the ” nuclei to th 
following are the primary configurations : 
Am, Jour. 8c1.—Taimp = ey Vou. XV, No. 90.—Junz, 1878. 
