Entomological News, and Proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia Volume 17

Entomological News, and Proceedings of the Entomological Section of the Academy of Natural Sciences of Philadelphia Volume 17

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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. 1906 edition. Excerpt: ...and in fifty per cent, alcohol, fifteen minutes in each; remove and stain in cyanin for two hours, then wash in fifty, seventy and. ninety per cent, alcohol, ten minutes in each, removing surplus stain and air bubbles, as explained above; then clear in oil of cloves and mount in xylol balsam. The time required for treating wings by this method is the same as by the last, and the results are equally good. 3. Unstained mounts. Wings to be mounted without staining should be bleached with hydrogen peroxid as already described. After washing in water and removing the air bubbles, mount directly in glycerine jelly. Wings treated by this method cannot be successfully photographed, whereas excellent photographs can be obtained from wings prepared by the first two methods. Either of these methods require less time than that described by Dr. Calvert or by the use of the Labarraque solution, and the venation resulting is more distinct. Hydrogen peroxid of three per cent, strength is prepared by many wholesale drug houses, and various trade names are used for the product, but all of these preparations which were tried gave equally good results. As this substance when warm oxidizes metallic instruments it is advisable to use a wooden lifter in transferring the wings or other parts treated from one medium to another. Although the stains already named have given the best results, the following have been tried: Cyanin, rosaniline, gentian violet, Bordeaux red, erythrosin, safranin, acid fuchsin, paracarmine, Grenacher's borax-carmine, Delafield'shsematoxylin, Ehrlich's acid hsematoxylin, Delafield's borax-carmine, methyl blue, orange G, analine hydrate chlorid and silver nitrate. Wings prepared and then stained with cyanin, rosaniline or gentian violet...show more

Product details

  • Paperback | 162 pages
  • 189 x 246 x 9mm | 299g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 123697946X
  • 9781236979469