. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Fig. 28.—The hive as it is employed to house and feed a colony used for experimental inoculations. Here are shown four Hoffman frames, a division board, four open Petri dishes as feeders, and the en- trance nearly closed with wire cloth, the opening being on the side of the hive body occupied by the colony. The dimensions Indicated are approximate. The angle at which the hive was photographed for this drawing caused its length to appear foreshortened. (Original.). Fig. 29.—Petri dish. The top half is slightly raised. T
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Fig. 28.—The hive as it is employed to house and feed a colony used for experimental inoculations. Here are shown four Hoffman frames, a division board, four open Petri dishes as feeders, and the en- trance nearly closed with wire cloth, the opening being on the side of the hive body occupied by the colony. The dimensions Indicated are approximate. The angle at which the hive was photographed for this drawing caused its length to appear foreshortened. (Original.). Fig. 29.—Petri dish. The top half is slightly raised. Those- used here are 4 inches in diameter. (Original.) 1 A Petri dish, a much-used piece of apparatus in a laboratory, is simply a shallow, circular, glass dish with a flat bottom and perpendicular sides. It consists of two halves, a bottom and a top. These are very similar. The top half, being slightly larger, fits over the bottom one when the two halves are placed 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 original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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