Gas collecting reservoir, described in Microscale Organic Laboratory, Mayo, Pike, Butcher text, as a means of collecting and sampling gaseous products when using a capillary gas delivery tube

Open-bottom tube has single line graduation at 3 and 4 mL level and 20-400 thread at top. The top joint is a combination cap, thread and standard taper joint to accommodate and seal other microscale apparatus. The O.D. of the top joint has an external thread to facilitate an o-ring and open-top phenolic cap. The internal or I.D. at the top is a ground standard taper 14/10 outer joint. Supplied with cap and septum.