Properties.--All attempts to make helium enter into stable chemical union have hitherto proved unsuccessful.
Hitherto the large bill for electric energy has debarred the general use of electrical heating, in spite of its numerous advantages.
Animals, hitherto unknown to the Romans, were exhibited in the circus, and an artificial lake (eunipus) was made for the reception of crocodiles and hippopotamuses.
The female, hitherto indistinguishable from the male, continues to swell until she attains the outlines of a lemon.
In Rome the pope gave way to popular clamour, granting one concession after another, and on the 8th of February he publicly called down Gods blessing on Italythat Italy hated by the Austrians, whose name it had hitherto been a crime to mention.