A Simple Method to avoid the Pen from being caught in the Seam of Recording Paper of Anemoscope

[摘要] This method is simply done by making a long thin narrow rising closely and parallel to the joint of cilinder, and a special small rod parallel to the penholder. Thus, when the pen just comes on the joint of recording paper, the small rod reaches on the rising; this put the pen so separate from the seam of recording paper that the pen does not be caught in it.

[学科分类] 大气科学