The elements of bacteriological technique : a laboratory guide for medical, dental, and technical students / by J.W.H. Eyre.

  • Eyre, John W. H. (John William Henry), 1869-
Date:
1913
Catalogue details

Licence: In copyright

Credit: The elements of bacteriological technique : a laboratory guide for medical, dental, and technical students / by J.W.H. Eyre. Source: Wellcome Collection.

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    7. Three aluminium rods (Fig. 63), each about 25 cm. long and carrying a piece of 0.015 gauge platino- iridium wire 7.5 cm. in length. The end of one of the wires is bent round to form an oval loop, of about i mm. in its short diameter, and is termed a loop or an oese; the terminal 3 or 4 mm. of another wire is flat- tened out by hammering it on a smooth iron surface to form a “spatula”; the third is left untouched or is pointed by the aid of a file. These instruments are _ 1 Fig. 63.—Ends of platinum rods, a, loop; h, spatula; c, needle. used for inoculating culture tubes and preparing speci- mens for microscopical examination. The method of mounting these wires may be de- scribed as follows: Take a piece of aluminimn wire 25 cm. long and about 0.25 cm. in diameter, and drill a fine hole com- pletely through the wire about a centimetre from one end. Sink a straight narrow channel along one side of the wire, in its long axis, from the hole to the nearest end, shallow at first, but gradually becoming deeper. On the opposite side of the wire make a short cut, 2 mm. in length, leading from the hole in the same direction. [The use of a fine dental drill and small circular saw, worked by a dental motor facilitates the manufacture of these aluminium handled instmments.] Now pass one end of the platinum wire through the hole, turn up about 2 mm. at right angles and press