CHAPTER X.

Inquiry into the interior construction of

the Earth--_continued_ 184

Density of 8·8 times that of water still too high for the

possible compression of the component matter of the

earth as known to us 185

Reasons for this conclusion drawn from crushing strains

of materials 186

A limit to density shown thereby 187

The greatest density need not exceed 6·24 of water 188

Gases shut up in the hollow centre. Their weight must so

far diminish the conceded maximum of 6·24 189

Density of inner half of earth at 3000 miles diameter.

Greatest density may be less than 5·833 of water 190

Supposed pressure of inclosed gases very moderate 191

Meaning of heat limit to density. Temperature of interior

half of shell and inclosed gases must be equal 193

State of the hollow interior 194

Results of the whole inquiry 195

New Theories in Astronomy · 第 10 / 23 章