APPENDIX. 



499 



887. Chemicals, Stains, and Apparatus. Addresses from 

 which it is recommended that these be obtained are given 

 in 204. 



888. Cleaning Slides and Covers. New ones may be soaked 

 at once in one of the following solutions, washed with water 

 and alcohol, and dried with a cloth. 



For used ones, if a balsam mount, warm, push the cover 

 into a vessel with xylol or the like, and put the slide into 

 another vessel with the same, leave for a few days, and then 

 put into strong alcohol. 



See also p. 142. 



HENEAGE GIBBES, Journ. Roy. Mic. Soc., iii, 1880, p. 392. 

 Place the cover-glasses in strong sulphuric acid for an hour 

 or two, wash well until the drainings give no acid reaction ; 

 wash first with methylated spirit, and then with absolute 

 alcohol, and wipe carefully with an old silk handkerchief . 



SEILER, ibid., p. 508. New slides and ftvers are placed 

 for a few hours in the following solution : 



