472 Scientific Intelligence. 
to have been felt in neither instance by persons in this vicinity. 
ne of these cases was at the time of the great earthquake which 
destroyed the town of Iquique, and produced so much destruc- 
tion along the coast of Peru, Bolivia and Northern Chile. The 
other was at the time of the severe mene ka ae ndoza. The 
moments at Cordoba were of course very ot ately given 
by the clock itself, and accounts caneally obt eae from the 
points of chief disturbance give the same result as former 
on 
occasions, viz: that the interval of time re se the manifesta- 
tions at these Siri and at Cordoba was less than the snare 
of the watches. This you may remember was the case 
sa when the shock was eee y felt in Cordoba, althou zh the 
tele 
nly a da 
two previous, and the time as shown the dial agreed with that 
Ww WW 
can be measured without special preparation and sani seren 
SCIENTIFIC INTELLIGENCE. 
J. CHEMISTRY AND PHysIcs. 
1. The sion of the Solid Elements a Function of their 
ctiong weight. “since all gases, ve similar physical conditions, 
contain in saat umes the same number of molecules, they 
must ‘al have the “ists coeificising of expansion, because this 
eir atomic weights. The quotient of the density of any such 
postmen referred to water as unity, divided by its atomic vee 
e 
gives the space occupied by one atom of that element. If 
ratio if this value be the Seetoat of expansion be obtained, 
ing re S appear, as is shown in tabular form for 
some s§! 
twenty-six solid Savahita: In the first column the symbols are 
en, in the second the density, i in the pitt the ig thee So 
in the fourth the expansion-coefficient expressed in parts im 
hundred million at 40° C., and i in the fifth ie ratio of this to thé 
to atomic Vouk Thes se Saouite coefficients often 
| iw Simple relizotis for seca Be allied elements; thus the value is 
