The Action of Copper on Leaves, with Special Reference to the Injurious Effects of Fungicides on Peach Foliage; A Physiological Investigation Volume 60

The Action of Copper on Leaves, with Special Reference to the Injurious Effects of Fungicides on Peach Foliage; A Physiological Investigation Volume 60

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 edition. Excerpt: ...of % mm bore is graduated in mm beginning with its zero at same level as zero on long arm, this scale on the short arm extending for 150 mm. At fr is a perforation through wall of female stop..cock connection on a direct line with capillary bore of S, thus permitting, after removal of S from L by slipping of f at stop..cock connection, the introduction clear into the cup C of a minute capillary tube explained below. It is readily seen that communication between L and 5 may be cut off by turning S upward from plane of paper about the stop..cock.joint as an axis, so as to bring S into a position approximately perpendicular to plane of L. The iron (some noncorrosive metal would be better) discs D are 2 mm thick, 30 mm in diameter, and contain two perforations, H 10 mm in diameter and h of sufficient size to admit loosely the bulb of thermometer T. The discs are slightly beveled on the perimeter, thus forming a shallow trench around edge when put face to face. The perforations /l and H are so placed in the two discs that each coincides with its fellow when they are placed together. These discs fit loosely into the cup C, and are shown in radial section in place in cup at D. In use, a circular disc somewhat larger than the perforation His carefully cut from a leaf and cemented over H on one of the discs by means of a mixture of asphalt, beeswax, and resin. This cement is spread by means of a warm needle over the entire surface of the metal disc, care being taken to prevent its spreading over the leaf surface not in contact with the metal. Then the other disc is slightly warmed and carefully adjusted so as to make the corresponding perforations exactly coincide. Thus cemented together the discs carrying the piece of leaf are together cemented...show more

Product details

  • Paperback | 46 pages
  • 189 x 246 x 3mm | 100g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236946383
  • 9781236946386