Report on the bed-bug.

  • Great Britain. Ministry of Health
Date:
1934
Catalogue details

Licence: Public Domain Mark

Credit: Report on the bed-bug. Source: Wellcome Collection.

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    APPENDIX I. The following are the results of a qualitative examination carried out in by Be Local Authorities. A. Liguips. On standing a layer of liquid fatty acid rose to the surface. Super-fatted soap solution, probably containing extract of pyrethrum or similar substance. | oil separated on standing. Paraffin + phenols -+ nitrobenzene. Paraffin +- phenols (and possibly essential oils). alkaline and formed a lather on being shaken. Alkaline soap solution containing a little phenol a volatile oil and traces of an essential oil with odour of cedarwood. odour. Paraffin + phenols + essential oil with odour of lemon. to litmus. Soap solution -+- wood creosote. reaction. Soap solution + formaldehyde. (See No. 22) Paraffin -+- phenols + nitrobenzene. It also contained a small quantity of a basic yellow dyestuff, which on acidification gave a brilliant magenta colour. heavy yellow oil. Odour phenolic and almond-like. Paraffin + nitrobenzene + small quantity of phenols. Clear, amber coloured, mobile fluid with a pleasant smell resembling lemon. Paraffin + phenols + essential oil (lemon). Clear, amber coloured, mobile fluid with a musty odour. Paraffin + phenols + unidentified substance. Clear green mobile fluid with faint aromatic odour. Paraffin -+ small quantity of phenols + basic yellow dyestuff. A neutral substance which imparted an intense green colour to the paraffin, was not separated or identified. Pale yellowish-green mobile fluid with a faint aromatic odour. Paraffin + chlorinated hydrocarbons + phenols.
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