There are machines to dig, to hammer, to push--to do every kind of heavy job and to make work thousands of times easier and faster. On farms, in the mines, in cities where huge buildings are built and out in the woods where powerdriven saws slice through great trees, many kinds of special machines do many kinds of remarkable jobs. Can you imagine a giant shovel so huge that it took 45 freight cars to haul it from factory to mine? Do you know that there is a machine that plucks the feathers off chickens, ones that pick corn, dig potatoes? Inventors of machines work on everything--they even had fun making a mechanical mouse that can sniff about until it finds a piece of “cheese” and then “remember” and run straight to it next time! As marvelous and complicated as all these machines are, the author points out that no inventions will ever be as wonderful as the men who invented them--and the men who make them work. You will find this book an exciting companion to TRAINS AT WORK, SHIPS AT WORK, TRUCKS AT WORK. Garden City Books Garden City, New York * * * * * TRUCKS AT WORK _By_ Mary Elting _Illustrated by_ Ursula Koering This is a book about the sort of trucks that you see every day, as well as the most wonderful out-of-the-way trucks that you may not yet have discovered. It tells of city trucks, with their endless and fascinating cargoes, trucks that help on the farm, and trucks that rumble along the country roads hauling anything from horse-stables to houses. The author also tells you how the drivers arrange their routes, and how they learned to foil hijackers--and the pictures will tell you just as much as the text. You can see how a truck is loaded so that nothing gets smashed or spoilt; and how a truck Roadeo tests the skill of the men who drive the huge trailer rigs. There is lots of fun here besides useful information. Garden City Books Garden City, New York * * * * * FOUR INFORMATIVE BOOKS [Illustration: TRUCKS AT WORK] Every kind of truck.... loads they haul, the way the drivers.... arrange their routes, how to foil.... hijackers and how a truck Roadeo.... is run are vividly presented in story and colorful pictures. _ILLUSTRATED BY URSULA KOERING_ [Illustration: SHIPS AT WORK] Freighters and tankers, tugs and giant ocean liners are shown in action. Vivid text and colorful pictures take you right through the world of ships and show you the life of the men who sail them. _ILLUSTRATED BY MANNING DE V. LEE_ [Illustration: TRAINS AT WORK]