The Elements of Bacteriological Technique

A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged.

Published: 1913
Language: English
Wordcount: 124,707 / 448 pg
Flesch-Kincaid Reading Ease: 73.9
LoC Category: QR
Downloads: 1,037
Added to site: 2009.01.07
mnybks.net#: 23052
Genre: Science
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Excerpt

lenmeyer flask (narrow neck).]

~Bohemian Flasks~ (Fig. 1).--These are the ordinary flasks of the chemical laboratory. A good variety, ranging in capacity from 250 to 3000 c.c., should be kept on hand. A modified form, known as the "pear-shaped" (Fig. 2), is preferable for the smaller sizes--i. e., 250 and 500 c.c.

~Erlenmeyer's Flasks~ (Fig. 3).--Erlenmeyer's flasks of 75, 100, and 250 c.c. capacity are extremely useful. For use as culture flasks care should be taken to select only such as have a narrow neck of about 2 cm. in length.

~Kolle's Culture Flasks~ (Fig. 4).--These thin, flat flasks (to contain agar or gelatine, which is allowed to solidify in a layer on one side) are extremely useful on account of the large nutrient surface available for growth. A surface cultivation in one of these will yield as much growth as ten or twelve "oblique" tube cultures. The wide mouth, however, is a disadvantage, and for many purposes thin, flat culture bottles known as ~

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