"It's quite easy," the boy declared. "If the shooting was done before half-past eight, it was done just about the time that the rain began. It would take Dan'l--if he'd done it--all of twenty minutes to walk from Lindstrom's place here. It rained heavily, if you like I can give you the amount of rain in tenths of an inch, and twenty minutes of walking in that rain would make him wet through. By the time it had rained five minutes, the ground would be muddy. But see, Mr. Abner, the soles of the shoes are quite dry. And, Dan'l's clothes are quite dry." He picked up the gun that stood leaning in the corner. "The gun's dry, it hasn't been cleaned and there's no rust on it. Dan'l hasn't got two sets of rough clothes and he sure hasn't got two guns. Doesn't that prove he couldn't have been out after the rain started?" The sheriff looked a little dubious. "Yo' sho' put up a good argument for yo' nigger," he said, "but yo' boys' foolin' about weather ain't evidence. That don't go in court, yo' know." "You're a little wrong there, Mr. Abner," said Anton's father. "This is an official co-operative observer's station of the Weather Bureau. By a decision of the supreme court, our records have got to be accepted as evidence. There's a ruling to that effect." "There is, eh?" said the sheriff. "First I ever knew of it. But if yo' say so, why, of course, it's so. But how can you-all tell when the rain began?" "When rain comes down unusually hard," the boy answered, "the Weather Bureau likes to keep a record of the amount of precipitation in five minute intervals. My big record-book is in the house, but here are the notes I made," and he took a little note-book from the pocket of his shirt. "'Rain began, 8.21,'" he read, "'first five minutes three-tenths of an inch, second five minutes four-tenths, third five minutes, three-tenths,'" he stopped and held the book open, "it began to get less, then, and I didn't need to keep the record any longer. But you can see, Mr. Abner, that it was impossible for Dan'l to have left the Lindstroms' and reached here before the rain came, and just as impossible for him to have come through the rain with dry clothes and dusty shoes." "An' the courts have a ruling that weather records is evidence?" "From an official station such as this, yes!" Anton's father declared. "Evidence as to weather is a factor in a great variety of cases. Civil cases are largely personal injury, damage to perishable goods by freezing or rain and loss by fire. The criminal cases are usually confined to murder trials. "When accidents occur by reason of a street car running into somebody or something, the question arises as to whether the rails were so slippery that the car could not be stopped. This fact is, of course, important in an action for damages. A slippery rail can be caused by 'sweating' but it is generally due to recent rain. The relative humidity may be such as to prevent the drying up of the rail.