. Bulletin - United States National Museum. Science. Fig. 113.—The Marx tray for alcoholic specimens (original.) frame, shown at Fig. 113. The top piece of the tray into which the vials are thrust has a cork center, in which holes corresponding to the size of the vials are made with a gun-wad punch. The outer end of the tray bears a label or labels describing the material in the tray. The vials used by Dr. Marx are of thinner glass than those which I recom- mend and flare slightly at the top, as shown in the accompanying illustrations. They are made in various sizes to accommodate larger and s
. Bulletin - United States National Museum. Science. Fig. 113.—The Marx tray for alcoholic specimens (original.) frame, shown at Fig. 113. The top piece of the tray into which the vials are thrust has a cork center, in which holes corresponding to the size of the vials are made with a gun-wad punch. The outer end of the tray bears a label or labels describing the material in the tray. The vials used by Dr. Marx are of thinner glass than those which I recom- mend and flare slightly at the top, as shown in the accompanying illustrations. They are made in various sizes to accommodate larger and smaller specimens. A vial thrust into the hole punched in the cork rests on the bot- tom piece of the tray, the flange or neck pre- venting it from sliding through. These trays are arranged on shallow shelves in a case or cabinet, especially constructed for the purpose and a large quantity of material may be stored by their use in small compass. The use of the cork center piece in the upper part of the tray is not a necessity, and a wooden piece may be used in which holes are bored with a, bitt of x)roper size. Preserving Micro-larvw in Alcohol.—The following is quoted from Packard's " Entomology for Beginners," for which it was translated from the "Deutsche Ent. Zeitg.^'' 1887, Heft I: "Dr. H. Dewitz mounts the larvae and pupae of Microlepidoptera,, and also the early stages of other small insects, in the following way: The insects are put into a bottle with 95 per cent alcohol. Many larvae turn black in alcohol, but boiling them in alcohol in a test tube will bleach them. They may then be finally placed in glass tubes as small and thin as possible, varying from to meter in diameter,.. Fig. 114.—Vials used in the Marx tray (original.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the ori
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
