Formaldehyde

H.COH. Gas obtained by oxidizing IMG:content-0135.jpg:[graphic] Ants: 1, male; 2, female; 3, workers. wood; in these they usually hibernate; a few kinds lay up winter stores of food. Copulation takes place in flight: then the males die and the females lose their wings. Some ants are injurious to vegetation, others are of use to man as they attack insects. The psychical activity of ants is high, some have well organized armies and plan regular campaigns, enslaving the conquered species. Others keep Aphides as milch-cows, or rear servants from kidnapped young. The agricultural ant of Texas is said to cultivate a peculiar grain. In some species the | 1791; Letters, 1829; Works, 9 vols., 1843. IMG:content-0136.jpg:[graphic] Forster, JOHN. 1812-1876. English e ayist and biographer. Statesmen of the Commonwealth , 7 vols., 1840; Goldsmith , 1848; Sir John Eliot , 1864; Landor , 1868; Dickens , 1871–74; Swift . 1876. | of which 50,958 tons is in the four main spans. pal defense of the pos i- tion; now a complex structure in armor, earth or sand and ce- IMG:content-0137.jpg:[blocks in formation] IMG:content-0138.jpg:[graphic] IMG:content-0139.jpg:[graphic] pleted 1890 over the Firth of Forth, Scotland. The four main spans are of the cantilever type, two of which are each 1,710 ft. | gut April 24, 1862.