100年前的生活妙招:如何看见风?
People don't often look back on the early 1900's for advice, but what if we could actually learn something from the Lost Generation? The New York Public Library has digitized 100 "how to do it" cards found in cigarette boxes over 100 years ago, and the tips they give are so practical that millennials reading this might want to take notes. How to See the Wind On a dry, windy day, take a long polished sheet of metal( a saw-blade will do) with a perfectly straight edge. Then sight carefully at some clearly defined object as shown, and you will see the air flowing over the saw's edge. |