![]() Used to prepare solutions and measure liquids very precisely.Ī porcelain or plastic funnel containing many small holes and a rubber stopper around its nozzle. The mark corresponds to the volume indicated on the flask. When connected to vacuum and capped with a Buchner funnel, used to filter mixtures of solids and liquids.Ī round flask with a long, thin opening bearing one mark. Erlenmeyers are used to hold liquids but should not be used for measurements of volume where precision is needed.Ī heavy Erlenmeyer flask with an inlet for vacuum and an opening that fits a Buchner funnel. Don't place its ribbed sides in the light path of the spectrometer!Ī tapered flask with an opening thinner than the base and coarse volumetric markings. Cover with lid to avoid mass loss.Ī clear, rectangular vessel of glass or plastic used to hold solutions for spectrometry. Used to heat solids to high temperatures. Distributes heat evenly over the surface of objects it holds.Ī porcelain dish capable of withstanding extreme heat (e.g., from a Bunsen burner). Used to hold crucibles and porcelain dishes heated by a Bunsen burner. A clamp holder screws in to both the ring stand and the clamp.Ī triangular device made of heat-resistent clay. Used in conjunction with a ring stand to hold equipment in place. Used to deliver liquids with very high volumetric precision. TutorialĪ long, thin cylindrical piece of glassware with a stopcock on one end. The valve on the base controls the flow rate of gas the valve on the side controls the amount of oxygen in the gas mixture. Used to hold liquids, but should not be used for measurements of volume where precision is needed.Ī metal tube with two valves and an inlet for natural gas. If people are becoming really interested in your middleware, and are willing to help, think about converting it to an WSGI middleware library so that it can be used in other frameworks.A cylindrical piece of glassware with coarse markings.If you think your middleware is useful in a few of your apps, and might be helpful for other people, still use the middleware of your framework (what Flask would really typically call an "extension"). ![]()
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