Publisher's Synopsis
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. 1913 edition. Excerpt: ... APPENDIX. 927. Chemicals, Stains, and Apparatus.--Addresses from which it is recommended that these be obtained are given in 11. 928. Cleaning Slides and Covers.--New ones should first be soaked in one of the following liquids: strong sulphuric, hydrochloric or nitric acid, or aqua regia, or a mixture of an ounce each of sulphuric acid and bichromate of potash with from 8 to 12 ounces of water, then washed first with water and lastly with alcohol, and dried with a clean cloth. For used ones, if a balsam mount, warm, push the cover into a vessel with x_ lol or other solvent of the mount, and put the slide into another vessel with the same, leave for a few days, and then put into strong alcohol. If this is not sufficient, treat as for new ones. Some persons boil in lysol, which I do not find efficacious. For the final treatment, see p. 121. 929. Gum for Labels.--Labels stuck on glass often strip off. This may be avoided (makpmann, Zeit. Amjew, Mik., ii, 1896, p. 151; Journ. Roy. Mic. Soc., 1897, p. 84) by means of the following adhesive: 120 grammes of gum arabic are dissolved in a quarter of a litre of water, and 30 grammes of gum tragacanth in a similar quantity. After a few hours the tragacanth solution is shaken until it froths, and mixed with the gum arabic solution. Strain through linen and add 150 grammes of glycerin previously mixed with 2.J grammes of oil of thyme. Peirce (Journ. app, Mic., ii, 1899, p. 627; Journ. Roy. Mic. Soc., 1900, p. 404) finds that if the end of the slide be painted with a thin solution of balsam, it may be written on with ink when dry, and the record preserved by a second coat painted over it. For other receipts see early editions. INDEX. The numbers refer to the payee. A. Abre, mounting medium, ..."
