New York, Industrial Publication Company · leaf 787
ugh the piece of paper on which the fly’s again he would pass forwards and back-: wards from one end cork to the other, or wings were fastened, a long and slender pin passed, as shown at Er. This pin en- he would hold it in a perpendicular posi-- tered the apex of the paper cone, F, on tion by one… … cone, while the other end he retained with Pp. This pole was sharpened toa fine point his feet ; suddenly he would raise the pole and spin it around. When releasing the | into the three small pieces of cork, a Bc. fly for exercise, and that he might clean Now I will try and describe the perform-…
Science
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
