. tions had to be made on each one; nor did a single one Now that the rat is considered to be an important of the half a hundred locks have, originally, the de- agent in the spread of plague, means are being adopted sired depth. to lessen its numbers. For this purpose, J. Danysz The canal system of… … of food contaminated with lantic coast service was the organism. In one ex- ST. LAWRENCE RIVER, urgent, the Standard Oil periment 200 rats were fed Company and other inter- on bread steeped in broth Canal, although as explained not in the St. Lawrence ests allowed several vessels which were of too…
Internet Archive · Public domain (published before 1931). Free to use for anything.
