Inside Out Library · Explore
Scientific American, Vol. 90, No. 9 (1904) (1904)
leaf 10
egard to the position row, using silk instead of powder post. Inclosing itself of the cable by listening at the receivers of the instru- withdraws again into the burrow, plugs with its cut- in a snug cell safe from intrusion and adding a filmy ments. tings and saliva, called “powder post,” the hole… … menoptera that we turn, in this case as in so many dry weight of a soluble lead compound others, to find the real enemy of the oak tree pruner. calculated as lead monoxide, when de- A small fly, hardly over a quarter of an inch (8 or 9 termined in a manner prescribed by the © 1904 SCIENTIFIC…Internet Archive · Public domain (published before 1931). Free to use for anything.
More pictures from Scientific American, Vol. 90, No. 9 (1904)
More like this
![An illustration from Episodes of insect life / by Acheta Domestica, [pseud.] ;edited and revised by J.G. Wood. (1879)](https://img.insideoutlibrary.com/img/200/wellcome-wellcome_b28066340-326-1.webp)
![An illustration from Episodes of insect life / by Acheta Domestica, [pseud.] ;edited and revised by J.G. Wood. (1879)](https://img.insideoutlibrary.com/img/200/wellcome-wellcome_b28066340-64-1.webp)
