"Hundreds of thousands of people do," the Forecaster replied. "You'd be surprised, Mr. Tighe, if you knew how big business firms all over the country study these changes of weather. Heating and lighting plants of great cities study conditions of cold and of darkness. Municipal systems, with exposed water mains, take precautions against frost. Large stockyards, like those of Chicago, drain their water pipes. Gasoline engines are drained. Street railway companies are supposed to turn more heat into their cars. Natural gas companies are required to put on a greater pressure. Dredging of sand and gravel is suspended. Piles of iron ore, lying on wharves, are placed in the holds of vessels to keep the ore from freezing solid. "Take ordinary questions of trade, which we all know well. Wholesalers distribute stocks of cold-weather goods to retailers when a cold spell is forecast, and wideawake retailers make special provisions for it. Advertising managers of big department stores, who prepare their advertisements for the daily papers, the day before, study weather reports very carefully. You can go into an ad-writer's office, with the sun shining in at his window, and find that he is writing display of umbrellas and rubbers. The explanation is the Weather Map, which is lying on his desk. Everywhere you go, you'll find that the really big business organizations study the Weather Reports as closely as a stock-broker studies the Wall Street reports." The farmer stared at the Forecaster. "Why," he said, in astonishment, "I never had any idea that the Weather Forecast was so important. I just thought people read it to know whether it was going to rain, whether they should take an umbrella or not." "Rain forecasts," the weather expert rejoined, "may be useful for one's personal comfort, but their importance is nation-wide. Until a few years ago, one-eighth of the value of the entire raisin crop was lost every year by occasional showers while the fruit was drying. The Weather Bureau established a special service to take care of this region and for five years there has not been a single non-avoidable loss. Berries are picked before rain. Vegetables which are dug before rain, stand shipment better than those dug afterwards. In the alfalfa region, rain forecasts are all-important, since the hay can be baled in the field when it is dry but not when it is wet. "Every kind of brick, cement, and lime manufacture has got to be protected from the rain, and twenty-four hours' notice enables all such factories to protect their product. Contractors for outdoor work make their estimates and contracts on the basis of weather forecasts, railroad companies provide against washouts, and irrigation companies control their output of water according to the expected rainfall." "This is great stuff," said Fred, under his breath to Ross. "I'm going to run this in the _Review_!"