. Civic biology; textbook of problems, local and national, that can be solved only by civic coöperation. Biology. Till-: ILVT rnoiJLEM 1 <o suffer likewise from their attacks. Finally the rat is the primary boast of trichina which causes so nuu-h damage and loss in the raising of swine. One of tlu; prime re(piisites hi all such industries, if they are to be conducted with safety and success, is rat-proof construction. The depredations of rats on fruits and vegetables, bulbs and seeds of all kinds, and all manner of merchandise, meats, and stored provisions are too well known to re(juire mor
. Civic biology; textbook of problems, local and national, that can be solved only by civic coöperation. Biology. Till-: ILVT rnoiJLEM 1 <o suffer likewise from their attacks. Finally the rat is the primary boast of trichina which causes so nuu-h damage and loss in the raising of swine. One of tlu; prime re(piisites hi all such industries, if they are to be conducted with safety and success, is rat-proof construction. The depredations of rats on fruits and vegetables, bulbs and seeds of all kinds, and all manner of merchandise, meats, and stored provisions are too well known to re(juire more than passing mention. liuildings are damaged, water pipes gnawed. Fig. 84. A small night's work for a rat Eleven chicks have heen killed and dragged into tlie hole and three bitten so that they died. Photograph by the author and buildings flooded, the insulation of electric wires de- stroyed, which, together with matches carried into their nests and ignited, cause numerous fires. " It is conservative to place the entire yearly loss to the people f»f AVashington from rats and mice at $400,000" (Lantz). For Baltimore, l>anlz esti- mates the yearly damage at $700,000; and foi- cities in the United States of over 100,000 inhabitants these studies would indicate an annual loss of $20,000,000. Black death, the bubonic plague, beginning hi China in 1334, swept westward ()\('r Furope, and in that single epi- demic killed, it is estimated, 25,<)<l'KO()() ])c*ople in Furope. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hodge, Clifton Fremont, 1859-; Dawson, Jean, 1873-. Boston, Ginn
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