248 Scientific Intelligence. 
priety of considering the element of density (or of its correla- 
tive, the square of the time of molecular aieanign), in connection 
with both A and M.” 
In the qtr after this suggestion was made, Dr. Menzzer an- 
nounced, as a se sai result SP at aati Annalen, Nov. 
7 time of sonorous earroe! ion nye 2 
2. From o seetenizonn on terrestrial magnetis 
Tidal differences byadaey iterenade): . 
M lagnetic variation & (time).? 
3. From Menzzer’s experimen 
' Weight « (magnetizing power).? 
This indirect confirmation, of a conjecture which was at first 
based on a plausible analogy, encourages me to ho ope that the fol- 
lowing comparisons between molecular and cosmiea kinetic values 
mA help to raters the specific magnetism of ir 
\ceording to Tredgold, iron may be sioiepatiad about yz/5o with- 
out permanent alteration of structure. Now the ratio, at the 
earth’s surface, of solar terrestrial attraction, is about +z'zo, and 
four sige the ratio of the specific gravity of air to that of iron 
8, approximately, between r2'00 and y755. Although this 
somewhat m — to ot f the least value, or 
about goby of the total force, ae is ete little greater than Helmholtz 
or 
‘Condensation across the position of eq minimum, oF 
vice versa, the effect produced by any constant force would be four 
t as during the half oscill either extreme 
to the point of equilibrium. The ratios of wave-velocity to elas- 
ity and density, and of revolution to distance from the center 
‘tietis oo - various experiments upon the relations of mag- 
spe ty to tenacity, in iron, and of magnetizing power to 
haar or to specific heat,* in coils ot different metals. 
* The specific heats of sail 
i ee 7 times that of ‘h: habe cobalt, and Sein diene atte A oy oe ans e. er 
sf rou nd th aio beeween sland ferential perso gre eon: 
would aoe ie peneraliy rbd rps “corms rte oso aden relations w. 
