According to Bruce Halliday: >From [log in to unmask] Mon May 2 23:13:15 1994 Message-Id: <[log in to unmask]> Date: Tue, 3 May 1994 13:11:43 EST Reply-To: Bruce Halliday <[log in to unmask]> Sender: Biological Systematics Discussion List <[log in to unmask]> From: Bruce Halliday <[log in to unmask]> Subject: microscope slides X-To: [log in to unmask] To: Multiple recipients of list TAXACOM <[log in to unmask]> I am interested in hearing of people's experiences with specimens mounted on microscope slides. I refer mainly to mites, but insects or insect parts are also relevant. Specifically, what are the advantages and disadvantages of different mounting media, such as Euparal, Canada Balsam, gum/chloral media such as Hoyer's, Berlese's etc., and others? How good is the optical quality of these media for your specimens? How easy or difficult is to prepare and mount specimens? How easy or difficult is it to remove a specimen from a slide for re-mounting? How successful are these media for long-term preservation of important specimens such as types and vouchers? Are old specimens on slides in your collections still in good condition? If specimens have deteriorated, what is the nature of the problem? If responses are sufficient and useful, I will compile a summary and post it. Thank you for your interest. Bruce Halliday. 3 May 1994.