THE Paralogistes pseudomathematicus has become so rare, or possibly so shy, that it is a real pleasure to find that the species is not extinct. Alack! that De Morgan is not with us, to do justice to ...

THIS is an enlarged and beautifully produced edition of a pamphlet which has been circulated before under the simpler title “The Trisection of an Angle”. Since Euclid cannot be supposed to have ...