Ver. 80. _Plato’s and Menecmus’ lore_—Proclus attributes the discovery of the conic sections to Plato, but obscurely. Eratosthenes seems to adjudge it to Menecmus. “_Neque Menecmeos necesse erit in cono secare ternarios._” (Vide _Montucla_.) From Greece they were carried to Alexandria, where (according to our author’s beautiful fiction) _Rectangle_ either did or might learn magic. Footnote 220: Ver. 86. _Zatanai_—Supposed to be the same with Satan.—Vide the _New Arabian Nights_, translated by Cazotte, author of “_Le Diable amoureux_”. Footnote 221: Ver. 87. _Gins_—the Eastern name for Genii.—Vide _Tales of ditto_. Footnote 222: Ver. 87. _Dom-Daniel_—a submarine palace near Tunis, where Zatanai usually held his court.—Vide _New Arabian Nights_. Footnote 223: Ver. 88. _Sulphur_—A substance which, when cold, reflects the yellow rays, and is therefore said to be yellow. When raised to a temperature at which it _attracts oxygene_ (a process usually called _burning_), it emits a blue flame. This may be beautifully exemplified, and at a moderate expense, by igniting those _fasciculi_ of brimstone _matches_, frequently sold (so frequently, indeed, as to form one of the London cries) by women of an advanced age, in this metropolis. They will be found to yield an _azure_, or blue light. Footnote 224: Ver. 90. _Caf_—the Indian _Caucasus_.—Vide _Bailly’s Lettres sur l’Atlantide_, in which he proves that this was the native country of Gog and Magog (now resident in Guildhall), as well as of the Peris, or fairies, of the Asiatic romances. Footnote 225: Ver. 91. _Judæa’s fabled king_—Mr. HIGGINS does not mean to deny that Solomon was really king of Judæa. The epithet _fabled_ applies to that empire over the Genii, which the retrospective generosity of the Arabian fabulists has bestowed upon this monarch. Footnote 226: Ver. 96. _Young volcanoes_—The genesis of burning mountains was never, till lately, well explained. Those with which we are best acquainted are certainly not viviparous; it is therefore probable, that there exists, in the centre of the earth, a considerable reservoir of their eggs, which, during the obstetrical convulsions of general earthquakes, produce new volcanoes. Footnote 227: