Monazite, a phosphate of thorium and other rare earths, contains on the average about i cc. per gram.
The extraction (as is the case with all the rare earths) is a matter of great difficulty.
The movements of the shaft are controlled by relays and electro-magnets which operate in response to the action of the subscriber whose telephone is fitted with a 'calling mechanism which, when the subscriber calls, earths the line a certain number of times for each figure in the number of the wanted subscriber.
Our regions will not be natural unless they mark out real discontinuities both of origin and affinity, and these we can only seek to explain by reference to past changes in the earths history.
To quote further: Existing floras exhibit only one moment in the history of the earths vegetation.